Exercise Right Atrial Stiffness From Pressure-Volume Loops and Prognosis in Pulmonary Hypertension.
BACKGROUND In pulmonary hypertension (PH), risk assessment focuses on right ventricular function and may overlook exercise-related right atrial (RA) functional limitation. We investigated whether RA stiffness during exercise reflects impaired right-heart filling reserve and is associated with prognosis beyond conventio...