M Ibrahim, I., L Dokhan , A., S Elsebaey, R., & G Abdellatif, M. (2020). Evaluation of the preoperative administration of sildenafil on operative and early postoperative outcome after mitral valve replacement in patients with pulmonary hypertension. The Egyptian Cardiothoracic Surgeon, 2(4), 148 - 154. https://doi.org/10.35810/ects.v1i1.150