Abstract
ABSTRACT Introduction Hypertrophic cardiomyopathy (HCM) is a genetic cardiac disorder leading to hypertrophy of the left ventricle excluding other etiologies. Patients can experience exertional chest pain, dyspnea, syncope or even sudden cardiac death (SCD). Traditional medical management consists of beta blockers (BB), nondihydropyridine calcium channel blockers and disopyramide. Mavacamten, a novel cardiac myosin inhibitor, has recently been shown to improve both quantitative and qualitative measures of obstructive HCM allowing some patients to defer septal reduction therapy. Areas covered This review delves into the pharmacotherapy of mavacamten, the evidence behind this first-in-class drug for HCM, guidance for clinical usage, and possible future uses for cardiac myosin inhibitors. Expert opinion Mavacamten should be incorporated into the standard armamentarium of medications used to treat obstructive HCM. PIONEER-HCM, EXPLORER-HCM and VALOR-HCM demonstrated improvements in peak LVOT gradient both at rest and post-exercise, cardiac biomarkers, New York Heart Association (NYHA) functional class and Kansas City Cardiomyopathy Questionnaire (KCCQ) scores. Unlike other medications utilized for treatment, mavacamten can delay or even obviate the need for septal reduction therapy.
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