Valsalva Maneuver in Pulmonary Arterial Hypertension: Susceptibility to Syncope and Autonomic Dysfunction.
Mar PL, Nwazue V, Black BK, Biaggioni I, Diedrich A, Paranjape SY, Loyd JE, Hemnes AR, Robbins IM, Robertson D, Raj SR, Austin ED. Valsalva Maneuver in Pulmonary Arterial Hypertension: Susceptibility to Syncope and Autonomic Dysfunction. Chest. 2016 05; 149(5):1252-60.