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[Myocardial infarction with normal coronary arteries]
Insights
Myocardial Infarction (MI) in patients with normal coronary arteries is rare, affecting 7% of cases. Most patients with this condition, often linked to smoking, remain asymptomatic long-term.
Area of Science:
- Cardiology
- Internal Medicine
Context:
- Myocardial Infarction (MI) with normal coronary arteries is a distinct clinical entity.
- Understanding its characteristics is crucial for accurate diagnosis and management.
Purpose:
- To analyze the clinical characteristics, risk factors, and outcomes of MI patients with unobstructed coronary arteries.
Summary:
- Retrospective study of 36 MI patients (7% of total MI cases) with normal coronary arteries.
- Average age 42, 75% male; cigarette smoking identified as a key risk factor.
- 94% had normal ejection fraction; 88% were asymptomatic long-term, suggesting unique physiopathology.
Impact:
- Highlights a specific subgroup of MI patients requiring tailored investigation.
- Suggests potential for favorable long-term prognosis despite acute event.
- Informs further research into the mechanisms of MI without obstructive coronary artery disease.
Abstract:
We retrospectively studied 36 cases of myocardial Infarction (MI) with normal coronary arteries, which had been obtained from a total of 538 patients with MI admitted to our Hospital in the last 3 years. All patients had coronary angiogram and left ventriculogram. The following data was reviewed: age, sex, coronary risk factors, clinical picture, short and long term follow up. The angiography findings were correlated. The average age of the patients was 42 years, 75% were male and 25% female. The 36 cases represent 7% of the total MI. Cigarette smoking was the only important risk factor. MI was the first manifestation of ischemic heart disease in 94% of the cases. The ejection fraction was normal in 94%; 27.6% presented some complication during the acute event. In the long term follow; up to 88% of the patients are asymptomatic. The physiopathologic mechanisms are analyzed.