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Related Experiment Videos

His bundle electrogram in patients with acute myocardial infarction

L Gould, C V Reddy, S G Kim

    Pacing and Clinical Electrophysiology : PACE
    |July 1, 1979
    PubMed
    Summary
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    Patients with acute myocardial infarction and conduction blocks experienced high mortality, mainly due to pump failure. His-ventricular (H-V) interval prolongation did not significantly impact mortality in these cardiac patients.

    Area of Science:

    • Cardiology
    • Electrophysiology

    Background:

    • Acute myocardial infarction (AMI) can lead to conduction abnormalities.
    • Atrioventricular (AV) block and bundle branch block (BBB) are significant complications of AMI.

    Purpose of the Study:

    • To investigate the impact of His bundle electrogram (HBE) findings, specifically the H-V interval, on acute mortality in AMI patients with conduction blocks.

    Main Methods:

    • His bundle electrogram studies were performed on 37 patients with AMI and complicating AV or BBB during their coronary care unit stay.
    • Patients were analyzed based on the type of conduction block (BBB, inferior MI, anterior MI) and H-V interval duration.

    Main Results:

    • Patients with complicating BBB had 50% acute mortality, primarily from pump failure. H-V interval did not correlate with mortality in this group.

    Related Experiment Videos

  • Patients with inferior wall MI had 6% mortality, with normal H-V intervals in most cases.
  • Patients with anterior wall MI had 29% mortality, with pump failure as the cause of death. Prolonged H-V interval did not affect mortality.

    • Conclusions:

    • Conduction blocks in AMI significantly increase acute mortality, with pump failure being the leading cause.
    • The H-V interval, as assessed by HBE, does not appear to be a reliable predictor of acute mortality in AMI patients with AV or BBB.