Fig. 4

Representative case (52-year-old female) of a patient with hypertrophic obstructive cardiomyopathy who underwent septal myectomy. Upper row displays the LV outflow tract (LVOT) cine images at late systole. Systolic anterior motion (SAM) of mitral valve can be seen in preoperative cine (A). After surgery, LVOT is unobstructed without SAM (B). Lower rows display the curves of preoperative (in red) and postoperative (in green) LA strain (C) and strain rate (D) over the cardiac cycle