Long-term prognostic value of left ventricular outflow tract gradient in hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is classified as non-obstructive or obstructive, based on the presence of left ventricular outflow tract (LVOT) obstruction. The threshold for obstructive HCM is ≥ 30 mmHg whereas a gradient ≥ 50 mmHg is generally regarded as the threshold for clinically significant obstruction a...