Digoxin is contraindicated in:
Ans. (D) Hypertrophic obstructive cardiomyopathy(Ref: KDT 8th/e p560, 561)Non selective b-blockers (propranolol) are the agents of choice for HOCM.In hypertrophic obstructive cardiomyopathy (HOCM), the LV outflow tract is narrowed during systole due to hypertrophic septum. Obstruction is worsened by:(a) Factors increasing myocardial contractility.-Digitalis-Sympathetic stimulation(b) Factors decreasing LV filling:-Valsalva maneuver-Peripheral vasodilators
Supraventricular tachycardia
Atrial fibrillation
Congestive heart failure
Hypertrophic obstructive cardiomyopathy
C.V.S