Sotatercept Improves Right Heart Mechanics Despite Reduced Myocardial Contractility in Pulmonary Arterial Hypertension: A Prospective Exercise Hemodynamic Study.

Sotatercept reduces right ventricular contractility by 24 weeks in pulmonary arterial hypertension patients but maintains RV-PA coupling and improves overall right heart mechanics.

• Why it matters: Understanding how treatments affect right heart function is vital because RV response to pressure overload influences patient outcomes in PA hypertension, yet effects of therapies like sotatercept on RV mechanics are unclear.
• What they did: The study involved 30 PA hypertension patients undergoing echocardiography and invasive pressure measurements at rest and during exercise before and after 24 weeks of sotatercept, assessing RV contractility, afterload, and deformation.
• The result: Despite decreased RV contractility and afterload, measures such as RV free wall strain and RA strain improved, indicating that sotatercept fosters a favorable energetic adaptation that preserves right heart function during exertion.