Digoxin is contraindicated in(REPEAT): (A) Supraventricular tachycardia, (B) Atrial fibrillation, (C) Congestive hea failure, (D) Hyperophic obstructive cardiomyopathy
Answer is D. non selective beta blockers(propanolol)are the Agents of choice for hyperophic obstructive cardiomyopathy in hyperophic obstructive cardiomyopathy, the left ventricular outflow tract is narrowed during systole due to hyperophic septum.. obstraction is worsened by Factors increasing myocardial contractility-digitalis,sympathetic stimulation factors decreasing left ventricular filling-valsalva maneuver,peripheral vasodilators Refer kDT 6/e p143