MRI derived left atrial volume index predicts treatment response in patients with PAH

Introduction: Pulmonary arterial hypertension is defined at cardiac catheterization as a mPAP≥ 25 mmHg and a pulmonary arterial wedge pressure (PAWP) ≤15mmHg. The presence of cardiac comorbidities is associated with a poorer response to therapy in patients with PAH and left ventricular diastolic dysfunction may exist even in the presence of a normal resting PAWP. The aim of this study was to use left atrial volume as a surrogate of left...