Early reverse remodeling of left heart morphology and function evaluated by cardiac magnetic resonance in HOCM afterTA-BSM

Motivation: The assessment of early morphology and functional reverse remodeling of the heart is significant for HOCM patient prognosis. Goal(s): This study aimed to evaluate the early cardiac morphology and function in HOCM after transapical beating-heart septal myectomy (TA-BSM) using CMR. Approach: 41 HOCM patients who underwent CMR before after TA-BSM were prospectively enrolled in the study. Preoperative and postoperative cardiac morphological and functional parameters were compared. Results: LVEF, wall thickness, LVMI, and LVRI decreased after TA-BSM. The △LVOTG and baseline LVMI were independently associated with greater left ventricular mass regression. Impact: Surgery relieves the mechanical stress overload of the left ventricle (LV) and greatly improves the LV hyperdynamic state. It is essential to evaluate left heart morphology and function accurately after TA-BSM.