Right atrial function is associated with right venticular diastolic stiffness: RA–RV interaction in pulmonary arterial hypertension

Pulmonary arterial hypertension (PAH) patients have altered right atrial (RA) function and right ventricular (RV) diastolic stiffness. This study assessed the impact of RV diastolic stiffness on RA-RV interaction.PAH patients with low or high end-diastolic elastance (Eed) (n=94) were compared with controls (n=31). Treatment response was evaluated in 62 patients. RV and RA longitudinal strain, RA emptying and RV filling were determined and...