Pulsus alternans occurs in -
pulses alternans is seen in 3 conditons a)large pericardial effusion b)left ventricular failure c)asthma so the answer is MI where there is left ventricular failure. Ref Harrison 20th edition pg 1523
Constrictive pericarditis
Viral myocarditis
Hypokalemia
Myocardial infarction
C.V.S