A patient with inferior wall myocardial infarction is in shock. The reason is: September 2008
Ans. A: Right ventricular infarction Acute myocardial infarction (MI) involving only the right ventricle is a rare event. Much more commonly, right ventricular infarction is associated with infarction of the inferior wall of the left ventricle, occurring in more than one-third of such cases. In such patients, the infarction typically involves the left ventricular inferior-posterior wall, septum, and posterior right ventricular free wall. A right ventricular infarct should be considered in all patients who present with an acute inferior wall myocardial infarction, especially in the setting of a low cardiac output. Patients may describe symptoms consistent with hypotension. Other presentations include high-grade atrioventricular block, tricuspid regurgitation, cardiogenic shock, right ventricular free wall rupture, and cardiac tamponade.
Right ventricular infarction
Mitral regurgitation
Infarction causing septal defect
Decreased ejection fraction from left ventricle
Right ventricular infarction