Ischemic coronary endothelium and microvasculature (None)

The ischemic coronary endothelium and microvasculature refer to the complex cellular and structural network of the heart's smallest blood vessels during periods of reduced oxygen supply. This system is not a single molecular target but rather a physiological site comprising endothelial cells, pericytes, and smooth muscle cells that regulate myocardial blood flow and nutrient exchange (StatPearls, 2023). In the context of ischemia, the endothelium loses its ability to produce vasodilators like nitric oxide and instead promotes a pro-inflammatory and pro-thrombotic state characterized by the expression of adhesion molecules such as ICAM-1 and VCAM-1 (PubMed, PMID: 31553215). This dysfunction is a primary driver of coronary microvascular dysfunction (CMD) and contributes significantly to the 'no-reflow' phenomenon observed after coronary interventions. Therapeutic strategies targeting this system aim to restore microvascular patency, stabilize the endothelial glycocalyx, and mitigate ischemia-reperfusion injury to preserve cardiac function (AHA/ACC Guidelines).

Other names

Coronary microvascular endotheliumIschemic heart microvasculatureCoronary microvascular bedCardiac microvascular endothelial cells

Modulation of vascular resistance through nitric oxide pathways, opening of ATP-sensitive potassium channels, and reduction of oxidative stress to improve myocardial perfusion.