Pulsus alternans occurs in -: (A) Constrictive pericarditis, (B) Viral myocarditis, (C) Hypokalemia, (D) Myocardial infarction
Answer is D. 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