Transmural myocardial infarction during pregnancy

Area of Science:

• Cardiology
• Obstetrics
• Physiology

Background:

• Myocardial infarction (heart attack) is rare in young, healthy pregnant women.
• Supine positioning during pregnancy can affect cardiovascular physiology.
• Transient ischemic events in pregnancy require further investigation.

Purpose of the Study:

• To investigate the cause of myocardial infarction in two young pregnant women.
• To explore the potential role of coronary artery spasm in pregnancy-related cardiac events.
• To propose a mechanism linking pregnancy to myocardial infarction.

Main Methods:

• Case report of two young pregnant women.
• Clinical presentation and diagnostic workup including coronary arteriograms.
• Analysis of potential etiological factors related to pregnancy and cardiovascular changes.

Main Results:

• Both patients experienced transmural myocardial infarction while in the supine position.
• Coronary arteriograms performed months later showed normal coronary arteries.
• No known risk factors for cardiovascular disease were identified in either patient.

Conclusions:

• Transient coronary artery spasm is a plausible cause of myocardial infarction in pregnancy.
• Renin release from the ischemic chorion may trigger coronary spasm.
• This mechanism offers a potential explanation for pregnancy-associated myocardial infarction.