Echocardiographic assessment of pulmonary vascular resistance in pulmonary arterial hypertension. - Roule, Vincent; Labombarda, Fabien; Pellissier, Arnaud; Sabatier, Rémi; Lognoné, Thérèse; Gomes, Sophie; Bergot, Emmanuel; Milliez, Paul; Grollier, Gilles; Saloux, Eric (Cardiovascular Ultrasound, 2010)