<prompt> All are the true regarding hyperophic obstructive cardiomyopathy, except:Digitalis is usefulLeft ventricular outflow obstructionAsymmetrical septal thicknessDouble apical impulse  <response>: Answer is A Digitalis is useful Repeat Digitalis is contraindicated in hyperophic obstructive cardiomyopathy HOCM. Digitalis causes an increase in myocardial contractility which increases the degree of obstruction in HOCM and worsens the condition. Drugs Contraindicated in HOCM are Drugs that increase myocardial Contractility DigitalisQ Sympathomimetic aminesQ b agonist Drugs which decrease ventricular volume preload NitratesQ DiureticsQ Any increase in myocardial contractility or decrease in ventricular volume preload increase the degree of obstruction in HOCMQ 