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Electrocardiographic changes in right ventricular infarction. A case report

L R Erhardt, A Sjögren

    Acta Medica Scandinavica
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

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    ST segment elevations in the V4R lead during acute myocardial infarction may indicate right ventricular (RV) involvement. However, autopsy findings suggest this ECG pattern might reflect posterior septal damage rather than RV necrosis itself.

    Area of Science:

    • Cardiology
    • Electrocardiography
    • Pathology

    Background:

    • ST segment elevation in right precordial leads (V4R) can indicate right ventricular (RV) involvement in acute inferior transmural infarction.
    • The exact cause of this electrocardiogram (ECG) pattern—whether RV infarction or posterior septal involvement—remains unclear.

    Observation:

    • A patient with anteroseptal transmural infarction presented with pronounced ST segment elevations in lead V4R.
    • Autopsy revealed extensive old infarction of the anterior and lateral RV walls.
    • Recent necrosis of the interventricular septum was also identified.

    Findings:

    • The study suggests that ST segment elevation in V4R in RV infarction cases may not solely be due to RV myocardial necrosis.
    • Findings indicate this ECG phenomenon could be caused by the visualization of a necrotic posterior septum through damaged RV myocardium.

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    Implications:

    • This case challenges the direct attribution of V4R ST elevation solely to RV necrosis.
    • It highlights the potential role of posterior septal pathology in generating this specific ECG finding.
    • Understanding this distinction is crucial for accurate diagnosis and management of myocardial infarction.