Figure 40f

Echocardiogram from a patient with hypertrophic cardiomyopathy. W. Two-dimensional parasternal long-axis view in diastole demonstrates asymmetric septal hypertrophy. The thickness of the ventricular septal wall (S) is 30 mm and that of the posterior wall (PW) is 20 mm. Characteristic brightening of the septal echoes is evident. The left ventricular outflow tract between the anterior mitral leaflet (AML) and the septum is virtually obliterated. The left atrium (LA) is dilated. X. M-mode study at the level of the mitral valve shows systolic anterior motion (arrow) of the mitral valve and the mitral valve (MV) abuts against the intraventricular septum in diastole. Y. M-mode study at the level of the aorta shows premature closure (arrow) of the anterior aortic leaflet. PML, posterior mitral leaflet; Ao, aorta; RV, right ventricle.

Felner, J.M., MD, Martin, R.P., MD, The Echocardiogram, Hurst's The Heart, 8th edition, p 403.