Figure 2. Preoperative Echocardiographic Parameters and Postmyectomy Specimen.

A, Doppler echocardiography of left ventricular outflow tract gradient in patient 3. B, Short-axis Doppler echocardiography of left ventricular outflow tract gradient in patient 3. C, Hematoxylin-eosin stain sample from patient 1. Vacuolization of myocardial tissue is evident and constitutes a typical light microscopy marker of intracellular storage. D, Anteroposterior view of the excised cardiac muscle specimen from patient 3 (16.7 g), which shows a yellowish instead of the usual reddish color. The cardiac muscle was excised via 2 incisions in the basal septum from 2 to 3 mm below the aortic valve and extended distally to the base of the papillary muscles, creating a trapezoid trough that was wider toward the left ventricular apex than at the subaortic level.