Types of Myocardial Infarction

Transmural infarcts and subendocardial infarcts

Transmural infarcts involve the full thickness of the ventricular wall, while subendocardial infarcts involve the subendocardium or intra-mural myocardium without extending all the way through the ventricular wall.

Transmural infarction

<p>Nontransmural infarctions frequently occur in the presence of severely narrowed but still patent coronary arteries, with sufficient collateral circulation, or if the artery is only transiently occluded.</p> Signup and view all the answers

<p>Patchy nontransmural MI may arise secondary to fibrinolysis or PCI of an originally occlusive thrombus, with restoration of blood flow before the wavefront of necrosis has extended from the subendocardium across the full thickness of the ventricular wall.</p> Signup and view all the answers

<p>The extent and type of MI are determined by factors such as the presence of collateral circulation, the patency of coronary arteries, and the duration of occlusion.</p> Signup and view all the answers