Clinically significant change in stroke volume in pulmonary hypertension. - van Wolferen SA; van de Veerdonk MC; Mauritz GJ; Jacobs W; Marcus JT; Marques KMJ; Bronzwaer JGF; Heymans MW; Boonstra A; Postmus PE; Westerhof N; Vonk Noordegraaf A (Chest, 2011)