Amin, Samy, Yasser Menaissy, and Waleed Gamal Abosenna. “Early Outcome of the Effect of Phosphodiesterase-5 Inhibitor on Pulmonary Hypertension in Patients Undergoing Mitral Valve Surgery”. International journal of health sciences 5, no. S2 (October 18, 2021): 1479–1490. Accessed June 8, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/15426.