BMPR2 and pulmonary arterial hypertension: Our aims were 1) To determine whether PAH patients who have suffered from hemoptysis exhibit a worse hemodynamic profile, more bronchial artery hypertrophy or more severe dilation of the main pulmonary artery; and 2) To explore whether a BMPR2 mutation puts PAH patients at a greater risk to develop bronchial hypertrophy or pulmonary artery dilation and subsequent hemoptysis.