Coronary microembolization

Area of Science:

• Cardiovascular Medicine
• Pathophysiology
• Interventional Cardiology

Background:

• Atherosclerotic plaque rupture is central to acute coronary syndromes and complications during cardiac interventions.
• Plaque rupture can lead to microvascular obstruction, not just epicardial artery occlusion.
• Coronary microembolization involves the spread of debris into smaller coronary vessels.

Purpose of the Study:

• To review the experimental pathophysiology of coronary microembolization in animal models.
• To highlight the consequences of coronary microembolization.
• To present clinical evidence and compare it with experimental findings.

Main Methods:

• Review of experimental pathophysiology in animal models of acute coronary syndromes.
• Analysis of consequences including reduced coronary reserve, microinfarction, and inflammation.
• Examination of clinical evidence in patients with coronary microembolization.

Main Results:

• Coronary microembolization causes reduced coronary reserve, microinfarction, and inflammation.
• Oxidative modification of contractile proteins and contractile dysfunction are observed.
• A perfusion-contraction mismatch occurs in the affected myocardium.

Conclusions:

• Coronary microembolization is a significant pathophysiological event following plaque rupture.
• Experimental models provide insights into clinical observations of microembolization.
• Understanding microembolization is crucial for managing acute coronary syndromes and interventions.