Management of patients with hypertrophic obstructive cardiomyopathy and severe mitral annular calcification can be challenging. Our cases highlight the importance of addressing all elements contributing to left ventricular outflow tract obstruction in cases of hypertrophic obstructive cardiomyopathy: hypertrophic basal interventricular septum, abnormal papillary muscles, and systolic anterior motion of the anterior mitral valve leaflet. Addressing mitral valve repair through aortotomy by performing a septal myectomy, papillary muscle realignment, and resection of aberrant chordae tendineae allows left ventricular outflow tract obstruction and systolic anterior motion to be successfully corrected. The success of these procedures depended on preoperative imaging and intraoperative provocation.
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