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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

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Various 12-lead electrocardiographic findings of diffuse three-vessel coronary artery spasm

K K Koh1

  • 1Department of Internal Medicine, Inha University Hospital, Kyunggi-do, Korea.

American Heart Journal
|May 1, 1992
PubMed

Insights

Diffuse three-vessel coronary artery spasm can occur without significant ST segment changes on an electrocardiogram (ECG). Consider this diagnosis in patients with angina and spasm during ergonovine testing, even with a normal ECG.

Area of Science:

  • Cardiology
  • Clinical Electrocardiography
  • Vascular Medicine

Background:

  • Coronary artery spasm is a transient constriction of coronary arteries.
  • Variant angina, or Prinzmetal's angina, is characterized by chest pain due to coronary artery spasm.
  • Diffuse three-vessel coronary artery spasm involves constriction in all three major coronary arteries.

Observation:

  • Electrocardiographic (ECG) findings in diffuse three-vessel coronary artery spasm can be variable.
  • Absence of significant ST segment changes on a 12-lead ECG is possible.
  • The development of an electrical gradient between anterior and inferior regions due to global ischemia influences ECG presentation.

Findings:

  • Diffuse three-vessel coronary artery spasm should be suspected when patients present with angina and spasm during ergonovine testing.
  • A lack of major ST segment changes on the ECG does not rule out diffuse coronary artery spasm.
  • Ergonovine provocation testing is crucial for diagnosing variant angina and coronary artery spasm.

Implications:

  • This study highlights the importance of considering coronary artery spasm in the differential diagnosis of angina, even with non-specific ECG findings.
  • Clinicians should be aware that a normal or near-normal ECG does not exclude significant coronary artery disease due to spasm.
  • Early and accurate diagnosis of coronary artery spasm can lead to timely and appropriate treatment, preventing adverse cardiovascular events.

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