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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Preoperative silent myocardial ischemia. Has it prognostic significance?

A Jánosi1, J Hankóczy, A Vértes

  • 1János Municipal Hospital III, Internal Department and Cardiology, Budapest, Hungary.

Cardiology
|January 1, 1991
PubMed

Insights

Preoperative silent myocardial ischemia, detected by Holter monitoring, predicts a higher risk of perioperative myocardial infarction in patients undergoing coronary artery bypass grafting (CABG). This finding aids in identifying high-risk surgical candidates.

Area of Science:

  • Cardiology
  • Cardiovascular Surgery

Background:

  • Coronary artery bypass grafting (CABG) is a common procedure for managing coronary artery disease.
  • Perioperative myocardial infarction (MI) is a significant complication following CABG, impacting patient outcomes.
  • Identifying preoperative risk factors for perioperative MI is crucial for improving surgical safety.

Purpose of the Study:

  • To investigate the prognostic significance of preoperative silent myocardial ischemia in patients scheduled for CABG.
  • To determine if Holter monitoring can identify patients at increased risk for perioperative MI.

Main Methods:

  • Ninety-five patients with stable-effort angina pectoris undergoing CABG were monitored using Holter for approximately 28 hours before surgery.
  • Electrocardiographic recordings (CM5 and modified inferior lead) were analyzed for silent ST depression.
  • Incidence of perioperative MI was compared between patients with and without silent ischemia.

Main Results:

  • Silent ST depression, indicative of silent ischemia, was detected in 12.6% of patients.
  • Perioperative MI occurred in 12.6% of the total cohort.
  • Patients with preoperative silent ischemia had a significantly higher incidence of perioperative MI (33.3% vs. 9.6%, p=0.034).

Conclusions:

  • Holter monitoring effectively identifies preoperative silent myocardial ischemia.
  • Preoperative silent ischemia is a significant predictor of perioperative myocardial infarction in CABG patients.
  • Further research into preventive strategies for this high-risk group is warranted.

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