NURS 3104 Study Guide - Final Guide: Coronary Occlusion, Coronary Circulation, Unstable Angina
7 Nov 2017
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In an mi, an area of the myocardium is permanently destroyed. Mi is usually caused by reduced blood ow in a coronary artery due to rupture of an atheroscleroticplaque and subsequent occlusion of the artery by a thrombus. In unstable angina, the plaque ruptures but the artery is not completely occluded. Because unstable angina and acute mi are considered to be the same process but differ-ent points along a continuum, the term acute coronary syndrome(acs) may be used in lieu of these diagnoses. Coronary occlusion, heart attack,and mi are terms used synonymously, but the preferred term is. The area of infarction develops over minutes to hours. As the cells are deprived of oxygen, ischemia develops; cellular injury occurs; and the lack of oxygen results in infarction, or the death of cells. The expression time is muscle re ects the urgency of appropriate treatment to improve patient outcomes. There are an estimated 70,000 mis per year in canada; of these, about.
