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Right ventricular dysfunction and associated factors in patients after coronary artery bypass grafting

Document Type : Original Article(s)

Authors

1 Associate Professor, Healthy Heart Research Center AND Heshmat Hospital, Department of Cardiology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

2 Assistant Professor, Cardiovascular Diseases Research Center AND Heshmat Hospital, Department of Cardiology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

3 Assistant Professor, Healthy Heart Research Center AND Heshmat Hospital, Department of Cardiology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

4 Associate Professor, Anesthesiology Research Center, Guilan University of Medical Sciences, Rasht, Iran

5 Assistant Professor, Department of Cardiac Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

6 Assistant Professor, Department of Cardiology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

7 Associate Professor, Department of Cardiac Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran

Abstract

BACKGROUND: Coronary artery bypass grafting (CABG) surgery is widely accepted as a revascularization method for coronary artery disease (CAD). Despite survival benefit and improvement in quality of life, CABG may impose major morbidities and significant complications. Right ventricle (RV) dysfunction is an important complication that may affect patient's longevity and functional capacity. The aim of this study was to evaluate the relationship between RV dysfunction and some invisible parameters like inferior vena cava (IVC) size with physical capacity.METHODS: In this prospective study, 61 eligible CABG candidates were enrolled and RV function was assessed by echocardiographic parameters before CABG and one week and six months after the procedure, using tricuspid annular plane systolic excursion (TAPSE), Tei Index (TI), peak systolic movement (Sm) (cm/s), and IVC size. Functional capacity was assessed by six-minute walk test (6-MWT) 6 months after CABG.RESULTS: 58 patients who did not have any perioperative RV dysfunction were remained until the end of study; mean age was 58.2 ± 7.9 years with 68.9% being men, and 3 patients died after CABG. Preoperatively, septal motion, RV indices, and IVC size were normal in all patients. The frequency of RV dysfunction according to abnormal TAPSE index, TI, and peak Sm one week after surgery was 81.0%, 79.0%, and 62.0%, respectively, and 6 months after surgery was 49.0%, 49.0%, and 37.0%, respectively. Mean walked distance in 6-MWT was significantly less in patients with RV dysfunction, older age, and higher number of involved vessels (P < 0.001).CONCLUSION: The significant reduction in RV function and impairment of exercise capacity after CABG in this study suggests cardiologists to pay more attention to RV assessment in follow-up visits of patients undergoing GABG.

Keywords

References
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ARYA Atherosclerosis Journal
Volume 15, Issue 3 - Serial Number 3
May and June 2019
Pages 99-105
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