Right Ventricular Load at Exercise Is a Cause of Persistent Exercise Limitation in Patients With Normal Resting Pulmonary Vascular Resistance After Pulmonary Endarterectomy

After successful PEA, patients with persistent exertional dyspnea display an abnormal pulmonary hemodynamic response to exercise, characterized by increased PVR and decreased Ca. Decreased Ca under exercise is a strong predictor of limited exercise capacity in these patients.