Vol 15, No 3 (2019):99-105

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

Madjid Chinikar, Mohammad Rafiee, Mohammadreza Aghajankhah, Mahboobeh Gholipour, Tolou Hasandokht, Vali Imantalab, Ali Mirmansouri, Ali Mohammadzadeh, Nassir Nassiri-Sheikhani, Mona Naghshbandi, Mahsa Pourabdollah, Mohammad Esmaeil Rezaee, Abbas Sedighinejad, Alimohammad Sadeghi-Meibodi, Heidar Dadkhah-Tirani



DOI: http://dx.doi.org/10.22122/arya.v15i3.1765

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


Coronary Artery Bypass Surgery; Right Ventricle; Inferior Vena Cava

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