INTRA-OPERATIVE AND POSTOPERATIVE OUTCOMES AND REQUIREMENT OF POSTOPERATIVE SILDENAFIL THERAPY IN PATIENTS WITH MITRAL VALVE DISEASE WITH SEVERE PULMONARY HYPERTENSION ON PREOPERATIVE ORAL SILDENAFIL THERAPY- REVIEW OF LITERATURE

Main Article Content

Dr Suman Kr Chatterjee
Dr Dipankar Chowdhury

Keywords

Sildenafil, Pulmonary hypertension, Mitral valve disease, Cardiothoracic surgery, Perioperative management, Pulmonary vasodilators

Abstract

Severe pulmonary hypertension has remained one of the dominant factors of perioperative morbidity and mortality among patients undergoing mitral valve surgery. The use of preoperative oral sildenafil therapy has been of growing interest as a method of maximising the pulmonary vascular hemodynamics and right ventricular functioning before surgery. Despite the fact that mitral valve repair or replacement may usually result in a decrease in the pulmonary pressures as a result of reducing left-sided cardiac obstruction, it is observed that a number of patients still record an increased pulmonary vascular resistance during the postoperative period than pre-operative times. These malfunctions lead to instability in the operating room, difficulty in weaning from cardiopulmonary bypass and difficulty in the postoperative recovery. Sildenafil, as a selective pulmonary vasodilator, can decrease the pulmonary artery pressures, improve the loading status of the right ventricle and improve the overall stability during the perioperative period. Nonetheless, its impact in the intra-operative period and the postoperative period is different with respect to the severity of the underlying disease, ventricular functioning, and postoperative hemodynamic reaction. Moreover, there are unanswered questions on which patients would be helped by the further use of sildenafil post-surgery and which ones can be harmed due to unwarranted exposure. This review summarises the modern evidence that assesses the effect of the preoperative administration of sildenafil on intra-operative and postoperative hemodynamic conditions, postoperative outcomes, and the clinical reasons for the continuity of the therapy after surgery. Further insight into these correlations can assist in refining the approaches of perioperative management and identify the patients who can benefit the most by receiving a customised pulmonary vasodilator treatment.

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