Cor Pulmonale

Complex MONDO:0004596 Pathograph 14 Show in embeddings browser Cardiovascular Disease Lung Disease

Cor pulmonale is right ventricular structural or functional impairment caused by pulmonary hypertension that arises from disorders of the lung, pulmonary vasculature, or gas exchange, rather than primary left-heart disease.

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4
Pathophys.
7
Phenotypes
14
Pathograph
3
Medical Actions
1
Deep Research
⚙

Pathophysiology

4
Pulmonary Vascular Bed Injury and Remodeling
Chronic lung, chest-wall, ventilatory-drive, or pulmonary vascular disease narrows or destroys portions of the pulmonary vascular bed. This raises pulmonary vascular resistance and provides the proximal substrate for secondary pulmonary hypertension.
pulmonary artery endothelial cell CL:0000115 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves pulmonary artery endothelial cell, annotated with endothelial cell (CL:0000115). CL:0000115 is a cell type from the Cell Ontology. pulmonary artery smooth muscle cell CL:0000192 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves pulmonary artery smooth muscle cell, annotated with smooth muscle cell (CL:0000192). CL:0000192 is a cell type from the Cell Ontology.
pulmonary vascular remodeling GO:0001974 ↑ INCREASED Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves increased pulmonary vascular remodeling, annotated with blood vessel remodeling (GO:0001974). GO:0001974 is a biological process from the Gene Ontology.
pulmonary artery UBERON:0002012 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in pulmonary artery (UBERON:0002012). UBERON:0002012 is an anatomical location from the Uberon multi-species anatomy ontology.
Downstream
Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction Loss and remodeling of the vascular bed interact with hypoxia and endothelial dysfunction to sustain high pulmonary vascular tone.
Show evidence (2 references)
PMID:8434203 SUPPORT Human Clinical
"Pathogenetic mechanisms involve hypoxic pulmonary vasoconstriction, mechanical narrowing of vessels and obstruction of the pulmonary vascular bed"
This review directly identifies vascular narrowing and obstruction as mechanisms that drive cor pulmonale.
PMID:25165714 SUPPORT Human Clinical
"The pathophysiology of PH in CLD is multifactorial and includes hypoxic pulmonary vasoconstriction, pulmonary vascular remodeling, small vessel destruction, and fibrosis."
Chronic lung disease pulmonary hypertension is the common pathway for chronic cor pulmonale, and this review names the remodeling and vessel-loss processes involved.
Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
Alveolar hypoxia and endothelial mediator imbalance cause pulmonary artery smooth-muscle constriction and remodeling. In COPD-associated cor pulmonale, nitric-oxide/prostacyclin loss and endothelin excess are described as contributors to vasoconstriction and proliferation.
pulmonary artery smooth muscle cell CL:0000192 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves pulmonary artery smooth muscle cell, annotated with smooth muscle cell (CL:0000192). CL:0000192 is a cell type from the Cell Ontology. pulmonary vascular endothelial cell CL:0000115 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves pulmonary vascular endothelial cell, annotated with endothelial cell (CL:0000115). CL:0000115 is a cell type from the Cell Ontology.
response to hypoxia GO:0001666 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves response to hypoxia (GO:0001666). GO:0001666 is a biological process from the Gene Ontology. hypoxic pulmonary vasoconstriction GO:0042310 ↑ INCREASED Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves increased hypoxic pulmonary vasoconstriction, annotated with vasoconstriction (GO:0042310). GO:0042310 is a biological process from the Gene Ontology.
pulmonary artery UBERON:0002012 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in pulmonary artery (UBERON:0002012). UBERON:0002012 is an anatomical location from the Uberon multi-species anatomy ontology. lung UBERON:0002048 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in lung (UBERON:0002048). UBERON:0002048 is an anatomical location from the Uberon multi-species anatomy ontology.
Downstream
Pulmonary Hypertension and Increased Right Ventricular Afterload Vasoconstriction, remodeling, and vascular-bed loss increase pulmonary arterial pressure and right ventricular afterload.
Show evidence (2 references)
PMID:18229565 SUPPORT Human Clinical
"Hypoxia and endothelial dysfunction play a central role in the development of pulmonary hypertension."
The COPD-focused review directly supports hypoxia and endothelial dysfunction as central drivers of the pulmonary hypertension that produces cor pulmonale.
PMID:16088545 SUPPORT Human Clinical
"chronic hypoxic pulmonary vasoconstriction and subsequent pulmonary artery hypertension, leading to increased right ventricular work and stress."
This supports hypoxic vasoconstriction as the upstream cause of pulmonary artery hypertension and right ventricular loading.
Pulmonary Hypertension and Increased Right Ventricular Afterload
Pulmonary hypertension is the hemodynamic bridge between chronic lung or pulmonary vascular disease and right ventricular remodeling. Elevated pulmonary vascular resistance increases the work required from the right ventricle.
pulmonary artery UBERON:0002012 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in pulmonary artery (UBERON:0002012). UBERON:0002012 is an anatomical location from the Uberon multi-species anatomy ontology. heart right ventricle UBERON:0002080 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in heart right ventricle (UBERON:0002080). UBERON:0002080 is an anatomical location from the Uberon multi-species anatomy ontology.
Downstream
Right Ventricular Hypertrophy, Dilatation, and Failure Persistent pressure loading causes compensatory right ventricular hypertrophy, then dilation and right-sided failure in susceptible patients.
Show evidence (2 references)
PMID:18229565 SUPPORT Human Clinical
"Cor pulmonale is a maladaptive response to pulmonary hypertension."
The review identifies pulmonary hypertension as the pathologic pressure load to which cor pulmonale is a maladaptive response.
PMID:16088545 SUPPORT Human Clinical
"pulmonary artery hypertension, leading to increased right ventricular work and stress."
This supports increased right ventricular afterload as the consequence of pulmonary artery hypertension.
Right Ventricular Hypertrophy, Dilatation, and Failure
The right ventricle initially remodels and hypertrophies in response to chronic pulmonary pressure load. With progression, dilation and right-sided heart failure can develop, producing systemic venous congestion and reduced exercise capacity.
cardiomyocyte CL:0000746 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves cardiomyocyte, annotated with cardiac muscle cell (CL:0000746). CL:0000746 is a cell type from the Cell Ontology.
cardiac muscle contraction GO:0060048 ⚠ ABNORMAL Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves abnormal cardiac muscle contraction (GO:0060048). GO:0060048 is a biological process from the Gene Ontology.
heart right ventricle UBERON:0002080 Uberon multi-species anatomy ontology (UBERON) Relation: this pathophysiological event occurs in this anatomical location This pathophysiological event occurs in heart right ventricle (UBERON:0002080). UBERON:0002080 is an anatomical location from the Uberon multi-species anatomy ontology.
Downstream
Right-Sided Heart Failure Once the pressure-loaded right ventricle dilates and decompensates, the clinical syndrome of right-sided failure with systemic venous congestion appears.
Dyspnea Impaired right ventricular-pulmonary arterial coupling limits the cardiac output achievable on exertion and contributes to breathlessness, alongside the underlying lung disease.
Show evidence (2 references)
PMID:8434203 SUPPORT Human Clinical
"Chronic cor pulmonale is defined as right-heart hypertrophy or right-ventricular dilatation and/or chronic right-heart failure"
The definition directly supports hypertrophy, dilatation, and chronic right-heart failure as the defining cardiac manifestations.
PMID:25165714 SUPPORT Human Clinical
"The effects of PH on the right ventricle (RV) range between early RV remodeling, hypertrophy, dilatation, and eventual failure"
This review describes the progression from pulmonary hypertension to right ventricular remodeling, hypertrophy, dilatation, and failure.
⬡

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.
Pathograph: causal mechanism network for Cor Pulmonale Interactive directed graph showing how pathophysiology mechanisms, phenotypes, genetic factors and variants, experimental models, environmental triggers, and treatments relate through causal and linked edges.
●

Phenotypes

7
Cardiovascular 3
Pulmonary Arterial Hypertension HP:0002092 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Pulmonary arterial hypertension (HP:0002092). HP:0002092 is a phenotype from the Human Phenotype Ontology.
Show evidence (1 reference)
PMID:16088545 SUPPORT Human Clinical
"Chronic cor pulmonale involves the enlargement of the right ventricle as a result of pulmonary hypertension"
The review directly identifies pulmonary hypertension as the driver of the right ventricular enlargement in chronic cor pulmonale.
Right Ventricular Hypertrophy HP:0001667 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Right ventricular hypertrophy (HP:0001667). HP:0001667 is a phenotype from the Human Phenotype Ontology.
Show evidence (1 reference)
PMID:16088545 SUPPORT Human Clinical
"The right ventricular hypertrophy that occurs in chronic cor pulmonale is a direct result of chronic hypoxic pulmonary vasoconstriction"
This directly supports right ventricular hypertrophy as a cor pulmonale manifestation.
Right-Sided Heart Failure Congestive heart failure HP:0001635 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is right-sided heart failure, annotated with Congestive heart failure (HP:0001635). HP:0001635 is a phenotype from the Human Phenotype Ontology.
Sequelae: Peripheral Edema
Show evidence (1 reference)
PMID:25165714 SUPPORT Human Clinical
"Development of PH is associated with poor prognosis and may progress to right heart failure"
This supports right heart failure as a downstream outcome of pulmonary hypertension in chronic lung disease.
Metabolism 1
Peripheral Edema HP:0012398 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Peripheral edema (HP:0012398). HP:0012398 is a phenotype from the Human Phenotype Ontology.
Show evidence (1 reference)
PMID:18229565 SUPPORT Human Clinical
"The presence of peripheral edema in cor pulmonale is almost invariably associated with hypercapnia."
The review specifically links peripheral edema with cor pulmonale in COPD.
Respiratory 3
Hypoxemia HP:0012418 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Hypoxemia (HP:0012418). HP:0012418 is a phenotype from the Human Phenotype Ontology.
Sequelae: Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
Show evidence (1 reference)
PMID:3124283 SUPPORT Human Clinical
"Patients presenting with chronic obstructive airways disease and hypoxic cor pulmonale were assessed"
The clinical cohort directly describes hypoxic cor pulmonale in chronic obstructive airways disease.
Hypercapnia HP:0012416 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Hypercapnia (HP:0012416). HP:0012416 is a phenotype from the Human Phenotype Ontology.
Sequelae: Peripheral Edema
Show evidence (1 reference)
PMID:3124283 SUPPORT Human Clinical
"57 patients had a PCO2 of more than 6.0 kPa (45 mm Hg)."
The hypoxic cor pulmonale cohort documents frequent hypercapnia.
Dyspnea HP:0002094 Human Phenotype Ontology (HP) Relation: this clinical feature is this phenotype This clinical feature is Dyspnea (HP:0002094). HP:0002094 is a phenotype from the Human Phenotype Ontology.
Show evidence (1 reference)
PMID:35252399 SUPPORT Human Clinical
"Patients in advanced GOLD stages and those with severe dyspnoea showed significantly decreased TAPSE/PASP."
This COPD cohort links severe dyspnea with impaired RV-pulmonary arterial coupling, a cor pulmonale measure.
💊

Medical Actions

3
Long-Term Oxygen Therapy
Action: oxygen therapyNCI Thesaurus (NCIT) Relation: this treatment is this clinical intervention This treatment is oxygen therapy (NCIT:C94624). NCIT:C94624 is a clinical intervention from the NCI Thesaurus. Ontology label: Oxygen Therapy NCIT:C94624
Agent: oxygen CHEBI:15379 Chemical Entities of Biological Interest (CHEBI) Relation: this treatment uses this therapeutic agent This treatment uses oxygen, annotated with dioxygen (CHEBI:15379). CHEBI:15379 is a therapeutic agent from Chemical Entities of Biological Interest.
Long-term supplemental oxygen is used in hypoxemic COPD-related cor pulmonale to improve oxygenation, pulmonary hemodynamics, and survival.
Mechanism Target:
INHIBITS Hypoxemia — Supplemental oxygen raises alveolar and arterial oxygen tension, correcting the hypoxaemia that initiates the vascular limb of cor pulmonale.
INHIBITS Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction — Relieving alveolar hypoxia removes the stimulus for sustained pulmonary vasoconstriction, which is how long-term oxygen arrests progression of the pulmonary circulatory disturbance.
Show evidence (2 references)
PMID:1925080 SUPPORT Human Clinical
"long-term oxygen therapy has had the most impressive impact on survival in patients with chronic obstructive pulmonary disease"
This directly supports long-term oxygen therapy as a survival-improving intervention in COPD-associated cor pulmonale.
PMID:3124283 SUPPORT Human Clinical
"Progressive disturbances of the pulmonary circulation were arrested."
This long-term clinical study supports oxygen therapy as stabilizing the pulmonary circulation in hypoxic cor pulmonale.
Selected Pulmonary Vasodilator Therapy
Action: PharmacotherapyNCI Thesaurus (NCIT) Relation: this treatment is this clinical intervention This treatment is Pharmacotherapy (NCIT:C15986). NCIT:C15986 is a clinical intervention from the NCI Thesaurus. NCIT:C15986
Agent: phosphodiesterase type 5 inhibitor Relation: this treatment uses this therapeutic agent This treatment uses phosphodiesterase type 5 inhibitor. endothelin receptor antagonist NCIT:C28313 NCI Thesaurus (NCIT) Relation: this treatment uses this therapeutic agent This treatment uses endothelin receptor antagonist (NCIT:C28313). NCIT:C28313 is a therapeutic agent from the NCI Thesaurus. prostanoid CHEBI:26347 Chemical Entities of Biological Interest (CHEBI) Relation: this treatment uses this therapeutic agent This treatment uses prostanoid (CHEBI:26347). CHEBI:26347 is a therapeutic agent from Chemical Entities of Biological Interest.
PH-specific vasodilators may be considered only in selected chronic lung disease patients with moderate-to-severe pulmonary hypertension; evidence is limited and not equivalent to established PAH indications.
Mechanism Target:
INHIBITS Pulmonary Hypertension and Increased Right Ventricular Afterload — PH-specific vasodilators act on the pulmonary vascular tone that sets right ventricular afterload; in chronic lung disease the evidence for doing so is limited and the indication is restricted to selected patients.
Show evidence (1 reference)
PMID:25165714 SUPPORT Human Clinical
"limited evidence to suggest that PH-specific vasodilators such as phosphodiesterase-type 5 inhibitors, endothelin receptor antagonists, and prostanoids may have a role"
The review supports possible use in selected patients but explicitly characterizes the evidence as limited, so the treatment claim is partial.
Careful Diuretic Therapy for Congestion
Action: PharmacotherapyNCI Thesaurus (NCIT) Relation: this treatment is this clinical intervention This treatment is Pharmacotherapy (NCIT:C15986). NCIT:C15986 is a clinical intervention from the NCI Thesaurus. NCIT:C15986
Diuretics can reduce congestion and right ventricular dilation but require caution because excessive preload reduction or worsened hypercapnia can be harmful.
Mechanism Target:
INHIBITS Peripheral Edema — Diuresis removes the retained salt and water that produces dependent oedema; this is symptomatic relief of congestion, not treatment of the pulmonary vascular lesion.
MODULATES Right Ventricular Hypertrophy, Dilatation, and Failure — Preload reduction decreases right ventricular dilatation and improves its contractility, but excessive diuresis can drop preload below what the pressure-loaded ventricle needs.
Show evidence (1 reference)
PMID:18229565 SUPPORT Human Clinical
"Diuretics reduce right ventricular dilatation and improve its contractility and also reduce extravascular lung water"
The same source warns that diuretics should be used cautiously, so this is curated as conditional partial support rather than a broad treatment claim.
🔬

Diagnosis

3
Right Heart Catheterization
Right heart catheterization directly measures pulmonary artery pressures and cardiac output and is the definitive hemodynamic test when cor pulmonale is suspected.
right heart catheterization NCIT:C49236 NCI Thesaurus (NCIT)
Results: Elevated mean pulmonary artery pressure and pulmonary vascular resistance support the pulmonary hypertension component of cor pulmonale.
Show evidence (1 reference)
PMID:18229565 SUPPORT Human Clinical
"Right heart catheterization is the gold standard to determine the exact PAPs."
The full-text review explicitly identifies right heart catheterization as the gold standard for pulmonary artery pressure measurement.
Doppler Echocardiography
Doppler echocardiography estimates pulmonary artery pressure and assesses right ventricular-pulmonary arterial coupling, including TAPSE/PASP.
echocardiography NCIT:C16525 NCI Thesaurus (NCIT)
Results: Elevated estimated pulmonary artery pressure, right ventricular enlargement, or reduced TAPSE/PASP support cor pulmonale physiology.
Show evidence (2 references)
PMID:25165714 SUPPORT Human Clinical
"evidence of PH can be appreciated on clinical examination, serology, radiological imaging, and Doppler echocardiography."
This supports Doppler echocardiography as a diagnostic modality for pulmonary hypertension in chronic lung disease.
PMID:35252399 SUPPORT Human Clinical
"RV-PA uncoupling was assessed as the echocardiographic tricuspid annular plane systolic excursion/pulmonary artery systolic pressure (TAPSE/PASP) ratio."
The cohort operationalizes cor pulmonale severity with an echocardiographic RV-PA coupling measure.
BNP Biomarker Assessment
BNP can support assessment of pulmonary hypertension and right ventricular dysfunction, while remaining adjunctive rather than definitive.
biomarker analysis NCIT:C63333 NCI Thesaurus (NCIT)
Markers: BNP
Results: Elevated BNP supports right ventricular strain in the appropriate clinical context.
Show evidence (1 reference)
PMID:18229565 SUPPORT Human Clinical
"BNP seems promising as a marker for pulmonary hypertension and right ventricular dysfunction."
The review supports BNP as a promising adjunct marker, so this is curated as partial support rather than a definitive diagnostic test.
{ }

Source YAML

click to show 
name: Cor Pulmonale
creation_date: '2026-05-06T11:55:45Z'
category: Complex
description: >-
  Cor pulmonale is right ventricular structural or functional impairment caused
  by pulmonary hypertension that arises from disorders of the lung, pulmonary
  vasculature, or gas exchange, rather than primary left-heart disease.
disease_term:
  preferred_term: cor pulmonale
  term:
    id: MONDO:0004596
    label: cor pulmonale
synonyms:
- pulmonary heart disease
- chronic cor pulmonale
parents:
- Cardiovascular Disease
- Lung Disease
pathophysiology:
- name: Pulmonary Vascular Bed Injury and Remodeling
  description: >-
    Chronic lung, chest-wall, ventilatory-drive, or pulmonary vascular disease
    narrows or destroys portions of the pulmonary vascular bed. This raises
    pulmonary vascular resistance and provides the proximal substrate for
    secondary pulmonary hypertension.
  cell_types:
  - preferred_term: pulmonary artery endothelial cell
    term:
      id: CL:0000115
      label: endothelial cell
  - preferred_term: pulmonary artery smooth muscle cell
    term:
      id: CL:0000192
      label: smooth muscle cell
  locations:
  - preferred_term: pulmonary artery
    term:
      id: UBERON:0002012
      label: pulmonary artery
  biological_processes:
  - preferred_term: pulmonary vascular remodeling
    term:
      id: GO:0001974
      label: blood vessel remodeling
    modifier: INCREASED
  evidence:
  - reference: PMID:8434203
    reference_title: "[Pathophysiology of cor pulmonale]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Pathogenetic mechanisms involve hypoxic pulmonary vasoconstriction,
      mechanical narrowing of vessels and obstruction of the pulmonary vascular
      bed
    explanation: >-
      This review directly identifies vascular narrowing and obstruction as
      mechanisms that drive cor pulmonale.
  - reference: PMID:25165714
    reference_title: >-
      Pulmonary hypertension and right heart dysfunction in chronic lung disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The pathophysiology of PH in CLD is multifactorial and includes hypoxic
      pulmonary vasoconstriction, pulmonary vascular remodeling, small vessel
      destruction, and fibrosis.
    explanation: >-
      Chronic lung disease pulmonary hypertension is the common pathway for
      chronic cor pulmonale, and this review names the remodeling and vessel-loss
      processes involved.
  downstream:
  - target: Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
    description: >-
      Loss and remodeling of the vascular bed interact with hypoxia and
      endothelial dysfunction to sustain high pulmonary vascular tone.
    causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
- name: Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
  description: >-
    Alveolar hypoxia and endothelial mediator imbalance cause pulmonary artery
    smooth-muscle constriction and remodeling. In COPD-associated cor pulmonale,
    nitric-oxide/prostacyclin loss and endothelin excess are described as
    contributors to vasoconstriction and proliferation.
  cell_types:
  - preferred_term: pulmonary artery smooth muscle cell
    term:
      id: CL:0000192
      label: smooth muscle cell
  - preferred_term: pulmonary vascular endothelial cell
    term:
      id: CL:0000115
      label: endothelial cell
  locations:
  - preferred_term: pulmonary artery
    term:
      id: UBERON:0002012
      label: pulmonary artery
  - preferred_term: lung
    term:
      id: UBERON:0002048
      label: lung
  biological_processes:
  - preferred_term: response to hypoxia
    term:
      id: GO:0001666
      label: response to hypoxia
  - preferred_term: hypoxic pulmonary vasoconstriction
    term:
      id: GO:0042310
      label: vasoconstriction
    modifier: INCREASED
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Hypoxia and endothelial dysfunction play a central role in the development
      of pulmonary hypertension.
    explanation: >-
      The COPD-focused review directly supports hypoxia and endothelial
      dysfunction as central drivers of the pulmonary hypertension that produces
      cor pulmonale.
  - reference: PMID:16088545
    reference_title: "Cor pulmonale: an overview."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      chronic hypoxic pulmonary vasoconstriction and subsequent pulmonary artery
      hypertension, leading to increased right ventricular work and stress.
    explanation: >-
      This supports hypoxic vasoconstriction as the upstream cause of pulmonary
      artery hypertension and right ventricular loading.
  downstream:
  - target: Pulmonary Hypertension and Increased Right Ventricular Afterload
    description: >-
      Vasoconstriction, remodeling, and vascular-bed loss increase pulmonary
      arterial pressure and right ventricular afterload.
    causal_link_type: DIRECT
- name: Pulmonary Hypertension and Increased Right Ventricular Afterload
  description: >-
    Pulmonary hypertension is the hemodynamic bridge between chronic lung or
    pulmonary vascular disease and right ventricular remodeling. Elevated
    pulmonary vascular resistance increases the work required from the right
    ventricle.
  locations:
  - preferred_term: pulmonary artery
    term:
      id: UBERON:0002012
      label: pulmonary artery
  - preferred_term: heart right ventricle
    term:
      id: UBERON:0002080
      label: heart right ventricle
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Cor pulmonale is a maladaptive response to pulmonary hypertension.
    explanation: >-
      The review identifies pulmonary hypertension as the pathologic pressure
      load to which cor pulmonale is a maladaptive response.
  - reference: PMID:16088545
    reference_title: "Cor pulmonale: an overview."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      pulmonary artery hypertension, leading to increased right ventricular work
      and stress.
    explanation: >-
      This supports increased right ventricular afterload as the consequence of
      pulmonary artery hypertension.
  downstream:
  - target: Right Ventricular Hypertrophy, Dilatation, and Failure
    description: >-
      Persistent pressure loading causes compensatory right ventricular
      hypertrophy, then dilation and right-sided failure in susceptible patients.
    causal_link_type: DIRECT
- name: Right Ventricular Hypertrophy, Dilatation, and Failure
  description: >-
    The right ventricle initially remodels and hypertrophies in response to
    chronic pulmonary pressure load. With progression, dilation and right-sided
    heart failure can develop, producing systemic venous congestion and reduced
    exercise capacity.
  cell_types:
  - preferred_term: cardiomyocyte
    term:
      id: CL:0000746
      label: cardiac muscle cell
  locations:
  - preferred_term: heart right ventricle
    term:
      id: UBERON:0002080
      label: heart right ventricle
  biological_processes:
  - preferred_term: cardiac muscle contraction
    term:
      id: GO:0060048
      label: cardiac muscle contraction
    modifier: ABNORMAL
  evidence:
  - reference: PMID:8434203
    reference_title: "[Pathophysiology of cor pulmonale]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Chronic cor pulmonale is defined as right-heart hypertrophy or
      right-ventricular dilatation and/or chronic right-heart failure
    explanation: >-
      The definition directly supports hypertrophy, dilatation, and chronic
      right-heart failure as the defining cardiac manifestations.
  - reference: PMID:25165714
    reference_title: >-
      Pulmonary hypertension and right heart dysfunction in chronic lung disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The effects of PH on the right ventricle (RV) range between early RV
      remodeling, hypertrophy, dilatation, and eventual failure
    explanation: >-
      This review describes the progression from pulmonary hypertension to right
      ventricular remodeling, hypertrophy, dilatation, and failure.
  downstream:
  - target: Right-Sided Heart Failure
    description: >-
      Once the pressure-loaded right ventricle dilates and decompensates, the
      clinical syndrome of right-sided failure with systemic venous congestion
      appears.
    causal_link_type: DIRECT
  - target: Dyspnea
    description: >-
      Impaired right ventricular-pulmonary arterial coupling limits the cardiac
      output achievable on exertion and contributes to breathlessness, alongside
      the underlying lung disease.
    causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
phenotypes:
- category: Cardiovascular
  name: Pulmonary Arterial Hypertension
  diagnostic: true
  description: >-
    Elevated pulmonary arterial pressure is the required hemodynamic mediator
    between lung or pulmonary vascular disease and right ventricular remodeling.
  phenotype_term:
    preferred_term: Pulmonary arterial hypertension
    term:
      id: HP:0002092
      label: Pulmonary arterial hypertension
  evidence:
  - reference: PMID:16088545
    reference_title: "Cor pulmonale: an overview."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Chronic cor pulmonale involves the enlargement of the right ventricle as a
      result of pulmonary hypertension
    explanation: >-
      The review directly identifies pulmonary hypertension as the driver of the
      right ventricular enlargement in chronic cor pulmonale.
  reports_on:
  - target: Pulmonary Hypertension and Increased Right Ventricular Afterload
    relationship: READOUT_OF
    direction: POSITIVE
    endpoint_context: DIAGNOSTIC
    interpretation: >-
      The elevated pulmonary artery pressure measured at catheterization or
      estimated by Doppler is the direct measurement of the haemodynamic node
      that bridges lung disease to right ventricular loading.
- category: Cardiovascular
  name: Right Ventricular Hypertrophy
  diagnostic: true
  phenotype_term:
    preferred_term: Right ventricular hypertrophy
    term:
      id: HP:0001667
      label: Right ventricular hypertrophy
  evidence:
  - reference: PMID:16088545
    reference_title: "Cor pulmonale: an overview."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The right ventricular hypertrophy that occurs in chronic cor pulmonale is
      a direct result of chronic hypoxic pulmonary vasoconstriction
    explanation: >-
      This directly supports right ventricular hypertrophy as a cor pulmonale
      manifestation.
  reports_on:
  - target: Right Ventricular Hypertrophy, Dilatation, and Failure
    relationship: READOUT_OF
    direction: POSITIVE
    endpoint_context: DIAGNOSTIC
    interpretation: >-
      Imaging or electrocardiographic evidence of a thickened right ventricle
      measures the compensatory limb of the right ventricular remodeling node.
- category: Cardiovascular
  name: Right-Sided Heart Failure
  description: >-
    Chronic cor pulmonale can progress to right-sided heart failure with systemic
    venous congestion.
  phenotype_term:
    preferred_term: right-sided heart failure
    term:
      id: HP:0001635
      label: Congestive heart failure
  evidence:
  - reference: PMID:25165714
    reference_title: >-
      Pulmonary hypertension and right heart dysfunction in chronic lung disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Development of PH is associated with poor prognosis and may progress to
      right heart failure
    explanation: >-
      This supports right heart failure as a downstream outcome of pulmonary
      hypertension in chronic lung disease.
  sequelae:
  - target: Peripheral Edema
    description: >-
      Raised right-sided filling pressures are transmitted back into the
      systemic venous bed, producing dependent oedema.
- category: Cardiovascular
  name: Peripheral Edema
  description: >-
    Peripheral edema occurs with systemic venous congestion and is especially
    associated with hypercapnia in COPD-related cor pulmonale.
  phenotype_term:
    preferred_term: Peripheral edema
    term:
      id: HP:0012398
      label: Peripheral edema
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The presence of peripheral edema in cor pulmonale is almost invariably
      associated with hypercapnia.
    explanation: >-
      The review specifically links peripheral edema with cor pulmonale in COPD.
- category: Respiratory
  name: Hypoxemia
  description: >-
    Chronic hypoxemia is a common context for cor pulmonale and an important
    driver of hypoxic pulmonary vasoconstriction.
  phenotype_term:
    preferred_term: Hypoxemia
    term:
      id: HP:0012418
      label: Hypoxemia
  evidence:
  - reference: PMID:3124283
    reference_title: >-
      Twelve year clinical study of patients with hypoxic cor pulmonale given
      long term domiciliary oxygen therapy.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Patients presenting with chronic obstructive airways disease and hypoxic
      cor pulmonale were assessed
    explanation: >-
      The clinical cohort directly describes hypoxic cor pulmonale in chronic
      obstructive airways disease.
  sequelae:
  - target: Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
    description: >-
      Chronic alveolar and arterial hypoxaemia arising from the underlying lung
      disease is the stimulus for sustained hypoxic pulmonary vasoconstriction,
      placing this phenotype upstream of the vascular mechanism rather than
      downstream of it.
- category: Respiratory
  name: Hypercapnia
  description: >-
    Hypercapnia is common in hypoxic COPD-related cor pulmonale and is linked to
    edema and sodium retention.
  phenotype_term:
    preferred_term: Hypercapnia
    term:
      id: HP:0012416
      label: Hypercapnia
  evidence:
  - reference: PMID:3124283
    reference_title: >-
      Twelve year clinical study of patients with hypoxic cor pulmonale given
      long term domiciliary oxygen therapy.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      57 patients had a PCO2 of more than 6.0 kPa (45 mm Hg).
    explanation: >-
      The hypoxic cor pulmonale cohort documents frequent hypercapnia.
  sequelae:
  - target: Peripheral Edema
    description: >-
      Hypercapnia promotes renal sodium and water retention, which is why oedema
      in COPD-related cor pulmonale tracks with carbon dioxide retention rather
      than with right ventricular failure alone.
    causal_link_type: INDIRECT_KNOWN_INTERMEDIATES
- category: Respiratory
  name: Dyspnea
  description: >-
    Dyspnea reflects the underlying chronic lung disease, pulmonary
    hypertension, and RV-pulmonary arterial uncoupling.
  phenotype_term:
    preferred_term: Dyspnea
    term:
      id: HP:0002094
      label: Dyspnea
  evidence:
  - reference: PMID:35252399
    reference_title: >-
      Relevance of Cor Pulmonale in COPD With and Without Pulmonary Hypertension:
      A Retrospective Cohort Study.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Patients in advanced GOLD stages and those with severe dyspnoea showed
      significantly decreased TAPSE/PASP.
    explanation: >-
      This COPD cohort links severe dyspnea with impaired RV-pulmonary arterial
      coupling, a cor pulmonale measure.
treatments:
- name: Long-Term Oxygen Therapy
  description: >-
    Long-term supplemental oxygen is used in hypoxemic COPD-related cor
    pulmonale to improve oxygenation, pulmonary hemodynamics, and survival.
  treatment_term:
    preferred_term: oxygen therapy
    term:
      id: NCIT:C94624
      label: Oxygen Therapy
    therapeutic_agent:
    - preferred_term: oxygen
      term:
        id: CHEBI:15379
        label: dioxygen
  evidence:
  - reference: PMID:1925080
    reference_title: >-
      Long-term oxygen therapy for cor pulmonale in patients with chronic
      obstructive pulmonary disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      long-term oxygen therapy has had the most impressive impact on survival in
      patients with chronic obstructive pulmonary disease
    explanation: >-
      This directly supports long-term oxygen therapy as a survival-improving
      intervention in COPD-associated cor pulmonale.
  - reference: PMID:3124283
    reference_title: >-
      Twelve year clinical study of patients with hypoxic cor pulmonale given
      long term domiciliary oxygen therapy.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: Progressive disturbances of the pulmonary circulation were arrested.
    explanation: >-
      This long-term clinical study supports oxygen therapy as stabilizing the
      pulmonary circulation in hypoxic cor pulmonale.
  target_mechanisms:
  - target: Hypoxemia
    treatment_effect: INHIBITS
    description: >-
      Supplemental oxygen raises alveolar and arterial oxygen tension, correcting
      the hypoxaemia that initiates the vascular limb of cor pulmonale.
  - target: Hypoxic Pulmonary Vasoconstriction and Endothelial Dysfunction
    treatment_effect: INHIBITS
    description: >-
      Relieving alveolar hypoxia removes the stimulus for sustained pulmonary
      vasoconstriction, which is how long-term oxygen arrests progression of the
      pulmonary circulatory disturbance.
- name: Selected Pulmonary Vasodilator Therapy
  description: >-
    PH-specific vasodilators may be considered only in selected chronic lung
    disease patients with moderate-to-severe pulmonary hypertension; evidence is
    limited and not equivalent to established PAH indications.
  treatment_term:
    preferred_term: Pharmacotherapy
    term:
      id: NCIT:C15986
      label: Pharmacotherapy
    therapeutic_agent:
    - preferred_term: phosphodiesterase type 5 inhibitor
    - preferred_term: endothelin receptor antagonist
      term:
        id: NCIT:C28313
        label: Endothelin Receptor Antagonist
    - preferred_term: prostanoid
      term:
        id: CHEBI:26347
        label: prostanoid
  evidence:
  - reference: PMID:25165714
    reference_title: >-
      Pulmonary hypertension and right heart dysfunction in chronic lung disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      limited evidence to suggest that PH-specific vasodilators such as
      phosphodiesterase-type 5 inhibitors, endothelin receptor antagonists, and
      prostanoids may have a role
    explanation: >-
      The review supports possible use in selected patients but explicitly
      characterizes the evidence as limited, so the treatment claim is partial.
  target_mechanisms:
  - target: Pulmonary Hypertension and Increased Right Ventricular Afterload
    treatment_effect: INHIBITS
    description: >-
      PH-specific vasodilators act on the pulmonary vascular tone that sets right
      ventricular afterload; in chronic lung disease the evidence for doing so is
      limited and the indication is restricted to selected patients.
- name: Careful Diuretic Therapy for Congestion
  description: >-
    Diuretics can reduce congestion and right ventricular dilation but require
    caution because excessive preload reduction or worsened hypercapnia can be
    harmful.
  treatment_term:
    preferred_term: Pharmacotherapy
    term:
      id: NCIT:C15986
      label: Pharmacotherapy
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Diuretics reduce right ventricular dilatation and improve its contractility
      and also reduce extravascular lung water
    explanation: >-
      The same source warns that diuretics should be used cautiously, so this is
      curated as conditional partial support rather than a broad treatment claim.
  target_mechanisms:
  - target: Peripheral Edema
    treatment_effect: INHIBITS
    description: >-
      Diuresis removes the retained salt and water that produces dependent
      oedema; this is symptomatic relief of congestion, not treatment of the
      pulmonary vascular lesion.
  - target: Right Ventricular Hypertrophy, Dilatation, and Failure
    treatment_effect: MODULATES
    description: >-
      Preload reduction decreases right ventricular dilatation and improves its
      contractility, but excessive diuresis can drop preload below what the
      pressure-loaded ventricle needs.
diagnosis:
- name: Right Heart Catheterization
  description: >-
    Right heart catheterization directly measures pulmonary artery pressures and
    cardiac output and is the definitive hemodynamic test when cor pulmonale is
    suspected.
  diagnosis_term:
    preferred_term: right heart catheterization
    term:
      id: NCIT:C49236
      label: Therapeutic Procedure
  results: >-
    Elevated mean pulmonary artery pressure and pulmonary vascular resistance
    support the pulmonary hypertension component of cor pulmonale.
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Right heart catheterization is the gold standard to determine the exact
      PAPs.
    explanation: >-
      The full-text review explicitly identifies right heart catheterization as
      the gold standard for pulmonary artery pressure measurement.
- name: Doppler Echocardiography
  description: >-
    Doppler echocardiography estimates pulmonary artery pressure and assesses
    right ventricular-pulmonary arterial coupling, including TAPSE/PASP.
  diagnosis_term:
    preferred_term: echocardiography
    term:
      id: NCIT:C16525
      label: Echocardiography Test
  results: >-
    Elevated estimated pulmonary artery pressure, right ventricular enlargement,
    or reduced TAPSE/PASP support cor pulmonale physiology.
  evidence:
  - reference: PMID:25165714
    reference_title: >-
      Pulmonary hypertension and right heart dysfunction in chronic lung disease.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      evidence of PH can be appreciated on clinical examination, serology,
      radiological imaging, and Doppler echocardiography.
    explanation: >-
      This supports Doppler echocardiography as a diagnostic modality for
      pulmonary hypertension in chronic lung disease.
  - reference: PMID:35252399
    reference_title: >-
      Relevance of Cor Pulmonale in COPD With and Without Pulmonary Hypertension:
      A Retrospective Cohort Study.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      RV-PA uncoupling was assessed as the echocardiographic tricuspid annular
      plane systolic excursion/pulmonary artery systolic pressure (TAPSE/PASP)
      ratio.
    explanation: >-
      The cohort operationalizes cor pulmonale severity with an
      echocardiographic RV-PA coupling measure.
- name: BNP Biomarker Assessment
  description: >-
    BNP can support assessment of pulmonary hypertension and right ventricular
    dysfunction, while remaining adjunctive rather than definitive.
  diagnosis_term:
    preferred_term: biomarker analysis
    term:
      id: NCIT:C63333
      label: Biomarker Analysis
  markers: BNP
  results: Elevated BNP supports right ventricular strain in the appropriate clinical context.
  evidence:
  - reference: PMID:18229565
    reference_title: Pulmonary hypertension and chronic cor pulmonale in COPD.
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      BNP seems promising as a marker for pulmonary hypertension and right
      ventricular dysfunction.
    explanation: >-
      The review supports BNP as a promising adjunct marker, so this is curated
      as partial support rather than a definitive diagnostic test.
review_notes: >-
  Falcon deep research was attempted twice from this worktree and produced no
  report; the generic cyberian fallback also stalled, and the repo-supported
  cyberian-codex fallback exited with code 137. This page was therefore curated
  from PubMed-backed references fetched with just fetch-reference, with exact
  evidence snippets validated against local caches.
📚

References & Deep Research

Deep Research

1

Deep research results are used as seeds for research; they do not undergo the same validation as the main records and may contain errors. How we use deep research.

Evaluations and curation notes (1)

Record review notes

Falcon deep research was attempted twice from this worktree and produced no report; the generic cyberian fallback also stalled, and the repo-supported cyberian-codex fallback exited with code 137. This page was therefore curated from PubMed-backed references fetched with just fetch-reference, with exact evidence snippets validated against local caches.

Cor Pulmonale Research Note ▸

Cor Pulmonale Research Note

Provider Attempts

Falcon was attempted twice with just research-disorder falcon Cor_Pulmonale after exporting EDISON_API_KEY from /home/harry/dismech/edison_tok. Both runs remained active without writing research/Cor_Pulmonale-deep-research-falcon.md and were terminated after bounded waits. The generic cyberian fallback (just research-disorder cyberian Cor_Pulmonale) likewise remained active without producing a report. The repo-supported cyberian-codex fallback (just research-disorder-cyberian-codex Cor_Pulmonale) started but exited with code 137.

Because no provider report was available, curation used PubMed-backed references fetched with just fetch-reference. Evidence snippets in kb/disorders/Cor_Pulmonale.yaml were selected from the fetched cache files and validated locally.

Mechanistic Summary

Cor pulmonale is right ventricular hypertrophy, dilation, and/or right-sided heart failure secondary to respiratory-system disease, pulmonary vascular disease, or chronic gas-exchange impairment rather than primary left-heart disease. The curated page treats it as a complex cardiopulmonary disorder.

The main mechanistic chain is:

  1. Chronic lung or pulmonary vascular disease causes pulmonary vascular-bed loss, narrowing, remodeling, and fibrosis.
  2. Hypoxemia drives hypoxic pulmonary vasoconstriction, and endothelial dysfunction shifts mediator balance toward vasoconstriction and vascular remodeling.
  3. Pulmonary hypertension and increased pulmonary vascular resistance raise right ventricular afterload.
  4. Persistent right ventricular loading leads to hypertrophy, dilation, and eventual right-sided failure with systemic congestion.

Treatment curation was limited to claims directly supported by cached evidence: long-term oxygen therapy for hypoxemic COPD-related cor pulmonale; conditional PH-specific vasodilator therapy where evidence is limited; and cautious diuretic therapy for congestion.