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Postinfarction angina caused by coronary arterial spasm
Circulation
|February 1, 1982
Summary
Post-myocardial infarction angina and ST-segment elevations may stem from coronary arterial spasm, not recurrent heart attacks. Calcium antagonists effectively managed these episodes in patients.
Area of Science:
- Cardiology
- Cardiovascular Research
- Clinical Medicine
Background:
- Recurrent ST-segment elevations during acute myocardial infarction recovery can be concerning.
- Distinguishing these elevations from new myocardial necrosis is crucial for patient management.
Purpose of the Study:
- To investigate the cause of recurrent ST-segment elevations and associated angina in post-myocardial infarction patients.
- To evaluate the role of coronary arterial spasm in these phenomena.
Main Methods:
- Monitoring ST-segment elevations and clinical symptoms in six post-myocardial infarction patients.
- Coronary cineangiography with ergonovine administration in one patient.
- Assessing the effect of calcium antagonists on angina and ST-segment elevations.
Main Results:
- Recurrent, transient ST-segment elevations were observed without evidence of new myocardial necrosis.
- Coronary arterial spasm was induced by ergonovine in one patient with a stenosed artery.
- Calcium antagonists significantly reduced postinfarction angina and ST-segment elevations.
Conclusions:
- Postinfarction angina and ST-segment elevations in these patients are likely caused by coronary arterial spasm.
- Coronary arterial spasm may precipitate severe, life-threatening cardiac dysrhythmias.