Hypertrophic Obstructive CardioMyopathy (HOCM)
HOCM is an increased left ventricle wall thickness involving a LV outflow tract obstruction as measured by any imaging technique: echocardiography, MRI or CT scan.
Invasive treatment to reduce LVOT obstruction should be considered in patients with a gradient > 50 mm Hg and moderate to severe symptoms; it is also considered in patients with moderate to severe SAM related mitral regurgitation.
Hypertrophic cardiomyopathy TEE
The most commonly performed surgical procedure used to treat LVOT obstruction is ventricular septal myomectomy (Morrow procedure), in which a rectangular trough is created in the basal septum below the aortic valve. The main surgical complication is AV nodal block requiring permanent pacemaker. Concomitant mitral valve surgery is required in 11-20 % of patients.