A

Disease A

Slug:Influenza
B

Disease B

Slug:Myocardial_Infarction
G

Causal Mechanism Graphs

Influenza

graph LR
    Respiratory_Epithelial_Infection_and_Cytopathic_Effect["Respiratory Epithelial Infection and Cytopathic Effect"]
    Endothelial_Dysfunction_and_Thromboinflammation["Endothelial Dysfunction and Thromboinflammation"]
    Immune_competent_microvascularized_lung_on_a_chip_IC_LOC_severe_H1N1_model["Immune-competent microvascularized lung-on-a-chip (IC-LOC) severe H1N1 model"]
    Triggering_of_Acute_Myocardial_Infarction["Triggering of Acute Myocardial Infarction"]
    Inflammasome_Activation_and_Cytokine_Storm["Inflammasome Activation and Cytokine Storm"]

    Endothelial_Dysfunction_and_Thromboinflammation --> Triggering_of_Acute_Myocardial_Infarction
    Immune_competent_microvascularized_lung_on_a_chip_IC_LOC_severe_H1N1_model --> Inflammasome_Activation_and_Cytokine_Storm
    Immune_competent_microvascularized_lung_on_a_chip_IC_LOC_severe_H1N1_model --> Respiratory_Epithelial_Infection_and_Cytopathic_Effect
    Immune_competent_microvascularized_lung_on_a_chip_IC_LOC_severe_H1N1_model --> Endothelial_Dysfunction_and_Thromboinflammation

    style Respiratory_Epithelial_Infection_and_Cytopathic_Effect fill:#dbeafe
    style Endothelial_Dysfunction_and_Thromboinflammation fill:#dbeafe
    style Immune_competent_microvascularized_lung_on_a_chip_IC_LOC_severe_H1N1_model fill:#ccfbf1
    style Triggering_of_Acute_Myocardial_Infarction fill:#dbeafe
    style Inflammasome_Activation_and_Cytokine_Storm fill:#dbeafe

Myocardial Infarction

graph LR
    Coronary_Atherothrombosis["Coronary Atherothrombosis"]
    Arrhythmia["Arrhythmia"]
    Chest_pain["Chest pain"]
    Anti_Inflammatory___Immunomodulatory_Therapy["Anti-Inflammatory / Immunomodulatory Therapy"]
    Myocardial_Ischemia_and_Cardiomyocyte_Death["Myocardial Ischemia and Cardiomyocyte Death"]
    Human_heart_on_a_chip_ischemia_reperfusion_assay_with_endothelial_extracellular_vesicle_rescue["Human heart-on-a-chip ischemia-reperfusion assay with endothelial extracellular vesicle rescue"]
    Epicardial_myocardial_heart_on_a_chip_model_of_ischemia_reperfusion_injury["Epicardial-myocardial heart-on-a-chip model of ischemia-reperfusion injury"]
    Cardiac_Fibrosis_and_Ventricular_Remodeling["Cardiac Fibrosis and Ventricular Remodeling"]
    Elevated_cardiac_troponin["Elevated cardiac troponin"]
    Post_Infarction_Inflammation_and_Cardiac_Repair["Post-Infarction Inflammation and Cardiac Repair"]
    Congestive_heart_failure["Congestive heart failure"]
    Syncope["Syncope"]
    Reduced_left_ventricular_ejection_fraction["Reduced left ventricular ejection fraction"]
    Dyspnea["Dyspnea"]
    Bioelectronically_instrumented_heart_on_a_chip_under_acute_hypoxia["Bioelectronically instrumented heart-on-a-chip under acute hypoxia"]
    Total_lipids_in_very_small_VLDL_XS_VLDL_L["Total lipids in very small VLDL (XS-VLDL-L)"]
    Coronary_Reperfusion_PCI_or_Fibrinolysis["Coronary Reperfusion (PCI or Fibrinolysis)"]
    Elevated_CK_MB["Elevated CK-MB"]
    Myocardial_infarct_border_zone_on_a_chip["Myocardial infarct border-zone-on-a-chip"]
    Myocardial_infarction["Myocardial infarction"]
    Angina_pectoris["Angina pectoris"]
    Human_cardiac_infarct_organoid_with_an_internal_oxygen_diffusion_gradient["Human cardiac infarct organoid with an internal oxygen-diffusion gradient"]
    Ventricular_fibrillation["Ventricular fibrillation"]
    Antiplatelet_and_Antithrombotic_Therapy["Antiplatelet and Antithrombotic Therapy"]
    Phospholipids_to_total_lipids_in_small_HDL_percent_S_HDL_PL%["Phospholipids to total lipids in small HDL, percent (S-HDL-PL%)"]
    Ischemia_Reperfusion_Injury["Ischemia-Reperfusion Injury"]

    Coronary_Atherothrombosis --> Myocardial_Ischemia_and_Cardiomyocyte_Death
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Ischemia_Reperfusion_Injury
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Post_Infarction_Inflammation_and_Cardiac_Repair
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Myocardial_infarction
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Angina_pectoris
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Chest_pain
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Arrhythmia
    Myocardial_Ischemia_and_Cardiomyocyte_Death --> Reduced_left_ventricular_ejection_fraction
    Ischemia_Reperfusion_Injury --> Ventricular_fibrillation
    Ischemia_Reperfusion_Injury --> Post_Infarction_Inflammation_and_Cardiac_Repair
    Post_Infarction_Inflammation_and_Cardiac_Repair --> Cardiac_Fibrosis_and_Ventricular_Remodeling
    Cardiac_Fibrosis_and_Ventricular_Remodeling --> Reduced_left_ventricular_ejection_fraction
    Cardiac_Fibrosis_and_Ventricular_Remodeling --> Congestive_heart_failure
    Arrhythmia --> Ventricular_fibrillation
    Arrhythmia --> Syncope
    Reduced_left_ventricular_ejection_fraction --> Dyspnea
    Coronary_Reperfusion_PCI_or_Fibrinolysis --> Coronary_Atherothrombosis
    Coronary_Reperfusion_PCI_or_Fibrinolysis --> Myocardial_Ischemia_and_Cardiomyocyte_Death
    Antiplatelet_and_Antithrombotic_Therapy --> Coronary_Atherothrombosis
    Anti_Inflammatory___Immunomodulatory_Therapy --> Post_Infarction_Inflammation_and_Cardiac_Repair
    Anti_Inflammatory___Immunomodulatory_Therapy --> Ischemia_Reperfusion_Injury
    Human_cardiac_infarct_organoid_with_an_internal_oxygen_diffusion_gradient --> Myocardial_Ischemia_and_Cardiomyocyte_Death
    Human_cardiac_infarct_organoid_with_an_internal_oxygen_diffusion_gradient --> Cardiac_Fibrosis_and_Ventricular_Remodeling
    Myocardial_infarct_border_zone_on_a_chip --> Myocardial_Ischemia_and_Cardiomyocyte_Death
    Myocardial_infarct_border_zone_on_a_chip --> Post_Infarction_Inflammation_and_Cardiac_Repair
    Human_heart_on_a_chip_ischemia_reperfusion_assay_with_endothelial_extracellular_vesicle_rescue --> Ischemia_Reperfusion_Injury
    Bioelectronically_instrumented_heart_on_a_chip_under_acute_hypoxia --> Myocardial_Ischemia_and_Cardiomyocyte_Death
    Epicardial_myocardial_heart_on_a_chip_model_of_ischemia_reperfusion_injury --> Ischemia_Reperfusion_Injury
    Epicardial_myocardial_heart_on_a_chip_model_of_ischemia_reperfusion_injury --> Cardiac_Fibrosis_and_Ventricular_Remodeling
    Myocardial_Ischemia_and_Cardiomyocyte_Death -.-> Elevated_cardiac_troponin
    Myocardial_Ischemia_and_Cardiomyocyte_Death -.-> Elevated_CK_MB
    Coronary_Atherothrombosis -.-> Total_lipids_in_very_small_VLDL_XS_VLDL_L
    Coronary_Atherothrombosis -.-> Phospholipids_to_total_lipids_in_small_HDL_percent_S_HDL_PL%

    style Coronary_Atherothrombosis fill:#dbeafe
    style Arrhythmia fill:#fef3c7
    style Chest_pain fill:#fef3c7
    style Anti_Inflammatory___Immunomodulatory_Therapy fill:#fce7f3
    style Myocardial_Ischemia_and_Cardiomyocyte_Death fill:#dbeafe
    style Human_heart_on_a_chip_ischemia_reperfusion_assay_with_endothelial_extracellular_vesicle_rescue fill:#ccfbf1
    style Epicardial_myocardial_heart_on_a_chip_model_of_ischemia_reperfusion_injury fill:#ccfbf1
    style Cardiac_Fibrosis_and_Ventricular_Remodeling fill:#dbeafe
    style Elevated_cardiac_troponin fill:#e0e7ff
    style Post_Infarction_Inflammation_and_Cardiac_Repair fill:#dbeafe
    style Congestive_heart_failure fill:#fef3c7
    style Syncope fill:#fef3c7
    style Reduced_left_ventricular_ejection_fraction fill:#fef3c7
    style Dyspnea fill:#fef3c7
    style Bioelectronically_instrumented_heart_on_a_chip_under_acute_hypoxia fill:#ccfbf1
    style Total_lipids_in_very_small_VLDL_XS_VLDL_L fill:#e0e7ff
    style Coronary_Reperfusion_PCI_or_Fibrinolysis fill:#fce7f3
    style Elevated_CK_MB fill:#e0e7ff
    style Myocardial_infarct_border_zone_on_a_chip fill:#ccfbf1
    style Myocardial_infarction fill:#fef3c7
    style Angina_pectoris fill:#fef3c7
    style Human_cardiac_infarct_organoid_with_an_internal_oxygen_diffusion_gradient fill:#ccfbf1
    style Ventricular_fibrillation fill:#fef3c7
    style Antiplatelet_and_Antithrombotic_Therapy fill:#fce7f3
    style Phospholipids_to_total_lipids_in_small_HDL_percent_S_HDL_PL% fill:#e0e7ff
    style Ischemia_Reperfusion_Injury fill:#dbeafe
S

Association Signals

Signal 1
LITERATURE EHR_COHORT_ASSOCIATION A_BEFORE_B
Population:Self-controlled case series of adults with laboratory-confirmed influenza and hospitalization for acute myocardial infarction, Ontario, Canada.
Temporal: A before B: , B before A: , Same time:
IRR: 6.05
CI: 3.86 - 9.5
p:
FDR:
Incidence ratio of acute MI admission during the 7-day post-influenza risk interval versus the control interval; no excess after day 7.
PMID:29365305 (SUPPORT)
Source: HUMAN_CLINICAL
"The incidence ratio of an admission for acute myocardial infarction during the risk interval as compared with the control interval was 6.05"
Self-controlled case series quantifies a ~6-fold increase in acute MI risk during the 7 days after laboratory-confirmed influenza.
H

Hypotheses

Acute influenza drives systemic inflammation, endothelial activation, platelet activation, and a procoagulant state that can destabilize vulnerable coronary atherosclerotic plaque and precipitate atherothrombotic coronary occlusion, triggering type 1 myocardial infarction.
PMID:29365305 (SUPPORT)
Source: HUMAN_CLINICAL
"Acute myocardial infarction can be triggered by acute respiratory infections."
States the mechanistic premise that acute respiratory infection, including influenza, can trigger acute myocardial infarction.
Pathophysiology:
Thromboinflammatory plaque destabilization: Influenza-driven inflammation and procoagulant shift promote coronary plaque instability and thrombosis.
Biological processes:
inflammatory response Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves inflammatory response (GO:0006954). GO:0006954 is a biological process from the Gene Ontology. platelet activation Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves platelet activation (GO:0030168). GO:0030168 is a biological process from the Gene Ontology. blood coagulation Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves blood coagulation (GO:0007596). GO:0007596 is a biological process from the Gene Ontology.
PMID:29365305 (SUPPORT)
Source: HUMAN_CLINICAL
"Acute myocardial infarction can be triggered by acute respiratory infections."
Supports infection-triggered acute MI via inflammatory/thrombotic mechanisms.
Y

Raw YAML

Show YAML
name: com_Influenza__Myocardial_Infarction
creation_date: "2026-06-25T12:00:00Z"
curation_status: CURATED
notes: >-
  Directional trajectory: acute influenza is a short-term trigger of acute
  (type 1) myocardial infarction, with the excess risk concentrated in the
  first week after infection. The mechanism — systemic inflammation,
  thromboinflammatory endothelial activation, and a procoagulant shift
  destabilizing vulnerable coronary plaque — is also captured as a
  pathophysiology node ("Triggering of Acute Myocardial Infarction") in
  Influenza.yaml. This entry models the disease-to-disease directional signal.

disease_a:
  slug: Influenza

disease_b:
  slug: Myocardial_Infarction

directionality: A_BEFORE_B

association_signals:
- source: LITERATURE
  method: EHR_COHORT_ASSOCIATION
  population: >-
    Self-controlled case series of adults with laboratory-confirmed influenza
    and hospitalization for acute myocardial infarction, Ontario, Canada.
  directionality: A_BEFORE_B
  statistics:
    metrics:
    - metric_type: IRR
      metric_value: 6.05
      metric_ci_lower: 3.86
      metric_ci_upper: 9.50
      notes: >-
        Incidence ratio of acute MI admission during the 7-day post-influenza
        risk interval versus the control interval; no excess after day 7.
    evidence:
    - reference: PMID:29365305
      reference_title: "Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "The incidence ratio of an admission for acute myocardial infarction during the risk interval as compared with the control interval was 6.05"
      explanation: >-
        Self-controlled case series quantifies a ~6-fold increase in acute MI
        risk during the 7 days after laboratory-confirmed influenza.

hypotheses:
- description: >-
    Acute influenza drives systemic inflammation, endothelial activation,
    platelet activation, and a procoagulant state that can destabilize
    vulnerable coronary atherosclerotic plaque and precipitate atherothrombotic
    coronary occlusion, triggering type 1 myocardial infarction.
  evidence:
  - reference: PMID:29365305
    reference_title: "Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Acute myocardial infarction can be triggered by acute respiratory infections."
    explanation: >-
      States the mechanistic premise that acute respiratory infection,
      including influenza, can trigger acute myocardial infarction.
  pathophysiology:
  - name: Thromboinflammatory plaque destabilization
    description: >-
      Influenza-driven inflammation and procoagulant shift promote coronary
      plaque instability and thrombosis.
    biological_processes:
    - preferred_term: inflammatory response
      term:
        id: GO:0006954
        label: inflammatory response
    - preferred_term: platelet activation
      term:
        id: GO:0030168
        label: platelet activation
    - preferred_term: blood coagulation
      term:
        id: GO:0007596
        label: blood coagulation
    evidence:
    - reference: PMID:29365305
      reference_title: "Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Acute myocardial infarction can be triggered by acute respiratory infections."
      explanation: Supports infection-triggered acute MI via inflammatory/thrombotic mechanisms.
Source:GitHub