Fig. 1From: Phosphodiesterase 5 inhibitor sildenafil in patients with heart failure with preserved ejection fraction and combined pre- and postcapillary pulmonary hypertension: a randomized open-label pilot studyFlow chart of patient enrollment. DST, diastolic stress test; HFpEF, heart failure with preserved ejection fraction; PASP, pulmonary artery systolic pressure; PVR, pulmonary vascular resistance; TPG, transpulmonary gradientBack to article page