The hemodynamic impact of acute nasal continuous positive airway pressure treatment in hypertrophic cardiomyopathy: is it safe?

Hypertrophic cardiomyopathy (HCM) is an important genetically inherited form of cardiomyopathy (1). In its obstructive form, dynamic left ventricular tract (LVOT) obstruction is a salient feature of the disease, and has been shown to be a strong independent predictor of progression to New York Heart Association functional III or IV heart failure, and increased mortality (2).