Constrictive-like physiology in severe pulmonary hypertension: the effect of the Valsalva maneuver.
L?pez-Candales A, Cleary H, Edelman K. Constrictive-like physiology in severe pulmonary hypertension: the effect of the Valsalva maneuver. South Med J. 2011 Apr; 104(4):282-4.