Figure 4.

Risk stratification of patients with hypertrophic cardiomyopathy using two-dimensional speckle tracking echocardiography. Example of a patient with hypertrophic obstructive cardiomyopathy with asymmetric septal hypertrophy and systolic anterior motion of the mitral valve (A). On echocardiographic speckle tracking analysis, the magnitude of global left ventricular longitudinal strain (GLS) is −13.8% (B). The study by Debonnaire et al showed that patients with a left ventricular GLS ≥−14% had higher rates of appropriate implantable cardioverter defibrillator (ICD) therapy compared with patients with more preserved GLS (<−14%) (C). Reproduced with permission from Debonnaire et al.61