Cytokinetics Presents New Data Related to Aficamten at the European Society of Cardiology Congress 2025

Core Insights - Aficamten demonstrates improved cardiac structure and function compared to metoprolol in patients with obstructive hypertrophic cardiomyopathy (HCM) as shown in the MAPLE-HCM study [1][2][4] - The annual incidence rate of atrial fibrillation (AF) with aficamten is reported at 1.5%, aligning with expected rates in HCM patient prediction models [1][8] - Long-term data supports the safety profile of aficamten, indicating no significant increase in AF risk and minimal clinical impact from new-onset AF [7][11][16] Company Overview - Cytokinetics is advancing aficamten, an investigational cardiac myosin inhibitor, currently under regulatory review in the U.S. with a target action date of December 26, 2025 [2][21] - The company is preparing for potential regulatory approvals and commercialization of aficamten following positive results from pivotal clinical trials [23] Clinical Data - The MAPLE-HCM study indicates aficamten's superiority over metoprolol in improving diastolic function and reducing left ventricular outflow tract (LVOT) obstruction [4][10] - In the FOREST-HCM study, long-term treatment with aficamten showed sustained hemodynamic benefits and a low incidence of new-onset AF [11][12] - Aficamten treatment resulted in significant improvements in patient-reported outcomes, including a 15-point increase in Kansas City Cardiomyopathy Questionnaire Clinical Summary Score [13] Safety Profile - An integrated safety analysis across multiple trials indicates aficamten has a low incidence of adverse events, comparable to placebo and metoprolol [16] - The incidence of LVEF <50% was low, with no serious heart failure events reported [14][16] Upcoming Events - Cytokinetics will host an investor webcast on September 2, 2025, to discuss the primary results from MAPLE-HCM and other data presented at the European Society of Cardiology Congress 2025 [17]