Exploring the Relationship Between Sleep Apnea, Myocardial Infarct Size, and Coronary Collaterals in Acute Myocardial...

Area of Science:

• Cardiology
• Sleep Medicine
• Medical Imaging

Background:

• Sleep apnea (SA) is a common condition that affects cardiovascular health.
• Acute myocardial infarction (AMI) is a leading cause of mortality worldwide.
• The cardioprotective role of SA in AMI patients remains unclear.

Purpose of the Study:

• To investigate the association between sleep apnea severity and infarct size in patients with acute myocardial infarction (AMI).
• To examine the relationship between sleep apnea and coronary collateral circulation in AMI patients.
• To explore the potential cardioprotective role of sleep apnea in the context of AMI.

Main Methods:

• Recruited adult patients with AMI who underwent sleep apnea (SA) testing and cardiac magnetic resonance (CMR) imaging.
• Quantified infarct size using delayed-enhancement CMR and coronary collateralization using the Rentrop Score.
• Compared infarct size and Rentrop grade across different SA severities using statistical tests (Wilcoxon Rank-Sum, Fisher's Exact).

Main Results:

• Of 33 patients, 76% had SA (mild, moderate, severe).
• No statistically significant differences in median infarct size were found between no SA (22%) and SA groups (28%).
• Moderate SA showed a trend toward smaller infarct size (15.5%) and a higher proportion of augmented coronary collaterals (62.5%) compared to other groups.

Conclusions:

• The study found no statistically significant differences in infarct size or coronary collaterals based on SA severity in AMI patients.
• Results suggest a potential cardioprotective benefit of moderate SA, warranting further investigation.
• Future research should explore SA's heterogeneous effects on ischemic preconditioning to guide clinical management in AMI patients.