Nonatherosclerotic processes are estimated to cause 6% of all acute myocardial infarctions and perhaps as many as 25% of myocardial infarctions in patients under the age of 35 years. The clinical, enzymatic, and electrocardiographic characteristics of these myocardial infarctions are indistinguishable from those of myocardial infarctions occurring in patients with coronary atherosclerosis. Although the prognosis for patients with myocardial infarction and angiographically normal coronary arteries is more favorable than that for patients with myocardial infarctions due to atherosclerosis, regional wall motion abnormalities and other complications of myocardial infarction can occur in the former group. We describe a patient who had a transmural myocardial infarction of the inferior wall in the presence of normal coronary arteries, complicated by the formation of a left ventricular pseudoaneurysm and the development of sustained ventricular tachycardia in the late postinfarction period. The etiology and natural history of myocardial infarction in patients with angiographically normal coronary arteries is discussed in this context.
|Original language||English (US)|
|Journal||Cardiovascular Reviews and Reports|
|State||Published - Jan 1 1993|
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine