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Silent myocardial ischemia

S Stern1, P F Cohn, C J Pepine

  • 1Hebrew University, Department of Cardiology Bikur Cholim Hospital, Jerusalem, Israel.

Current Problems in Cardiology
|May 1, 1993
PubMed
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Detecting myocardial ischemia, symptomatic or silent, is crucial for assessing adverse outcome risk. Objective testing for ischemia guides treatment intensity, not just pain presence, for better cardiovascular disease management.

Area of Science:

  • Cardiology
  • Diagnostic Testing
  • Risk Stratification

Background:

  • Abnormalities related to myocardial ischemia, whether symptomatic or silent, are critical for patient risk assessment.
  • Treatment decisions for coronary artery disease (CAD) should prioritize risk implications from objective ischemia testing over mere symptom presence.

Purpose of the Study:

  • To emphasize the importance of objective testing in identifying and managing myocardial ischemia.
  • To guide therapeutic strategies based on detected ischemia, irrespective of symptoms, for improved patient outcomes.

Main Methods:

  • Utilizing exercise stress tests to evaluate patients with analyzable ST segments.
  • Employing Holter monitoring for detecting asymptomatic ischemia during daily activities.
  • Leveraging left ventricular imaging techniques (e.g., echocardiography, angiography) to assess cardiac function and wall motion.

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Main Results:

  • Ischemic-type ST-segment depression detected during stress testing at low workload or prolonged duration indicates high risk.
  • Asymptomatic ischemia identified by Holter monitoring in high-risk patients may confer additional risk.
  • Abnormal findings from left ventricular imaging, such as reduced ejection fraction or reversible wall motion abnormalities, also signify high risk.

Conclusions:

  • Objective detection of ischemia, symptomatic or silent, mandates a high level of concern and guides treatment intensity.
  • Therapy should aim to eliminate transient ischemia, not solely alleviate symptoms.
  • Risk factor modification and aspirin are recommended for suspected or detected ischemia; medical therapy or revascularization should be considered for high-risk signals, even in asymptomatic individuals.