Patients with myocardial infarction and normal coronary arteriogram

Area of Science:

• Cardiology
• Vascular Medicine

Background:

• Acute myocardial infarction (MI) can occur in patients with normal coronary arteries.
• This presentation is less common and requires further investigation into underlying causes.

Purpose of the Study:

• To investigate the characteristics and clinical course of patients experiencing myocardial infarction despite having normal coronary angiograms.
• To explore the potential role of vasospastic phenomena in these cases.

Main Methods:

• Retrospective analysis of 18 patients with acute MI and normal coronary arteriograms.
• Clinical follow-up, electrocardiogram (ECG) stress testing, provocative spasm testing, and angiography were utilized.

Main Results:

• The study cohort predominantly comprised young female patients, with non-transmural MI in most cases.
• Eleven patients experienced residual chest pain; one had recurrent MI, while eight became asymptomatic.
• Evidence of vasospastic phenomena was observed in a significant proportion of patients.

Conclusions:

• Myocardial infarction with normal coronary arteries is frequently observed in young women and often involves non-transmural infarction.
• Vasospastic mechanisms appear to play a crucial role in these patients.
• Antispastic therapy may be beneficial for managing residual chest pain and improving outcomes.