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One-year real-world experience with mavacamten and its physiologic effects on obstructive hypertrophic cardiomyopathy.

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One-year real-world experience with mavacamten and its physiologic effects on obstructive hypertrophic cardiomyopathy. Frontiers in cardiovascular medicine Kim, D. S., Chu, E. L., Keamy-Minor, E. E., Paranjpe, I. D., Tang, W. L., O'Sullivan, J. W., Desai, Y. B., Liu, M. B., Munsey, E., Hecker, K., Cuenco, I., Kao, B., Bacolor, E., Bonnett, C., Linder, A., Lacar, K., Robles, N., Lamendola, C., Smith, A., Knowles, J. W., Perez, M. V., Kawana, M., Sallam, K. I., Weldy, C. S., Wheeler, M. T., Parikh, V. N., Salisbury, H., Ashley, E. A. 2024; 11: 1429230

Abstract

Mavacamten is a first-in-class cardiac myosin ATPase inhibitor, approved by the United States Food and Drug Administration for the treatment of hypertrophic cardiomyopathy with obstructive physiology (oHCM). Here, we present the real-world use of mavacamten in 50 patients with oHCM at a tertiary care referral center. In both our highlighted case and in our aggregate data, we report significant improvement in wall thickness, mitral regurgitation, left ventricular outflow tract obstruction and New York Heart Association symptom class. Moreover, in our center's experience, neither arrhythmia burden, nor contractility have worsened in the vast majority of patients: we note a clinically insignificant mean decrease in left ventricular ejection fraction (LVEF), with only two patients requiring temporary mavacamten discontinuance for LVEF?

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