Journal of Capital Medical University ›› 2017, Vol. 38 ›› Issue (4): 609-614.doi: 10.3969/j.issn.1006-7795.2017.04.023

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Evaluation of right ventricular function in patients with right coronary artery chronic total occlusion combined with old inferior wall myocardial infarction

Zhang Qi1, Chen Zhenwen2   

  1. 1. Department of Echocardiography Number 1 Lab, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China;
    2. Department of Medical Genetics and Developmental Biology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
  • Received:2017-03-15 Online:2017-07-21 Published:2017-07-20
  • Supported by:
    This study was supported by Natural Science Foundation of Beijing(7141002)

Abstract: Objective To investigate the changes of right ventricular function in patients with right coronary artery (RCA) chronic total occlusion(CTO)combined with old inferior wall myocardial infarction(OIWMI) with two-dimensional echocardiography and to explore its clinical significance. Methods We studied 28 consecutive patients with RCA-CTO accompanied by OIWMI in Beijing Anzhen hospital, from June 2013 to October 2015. The patients were divided into the coronary collateral circulation(CCC) group and non-CCC group according to the results of coronary angiography. Echocardiography was performed in order to measure the right ventri cular fractional area change(RVFAC), tricuspid annular plane systolic excursion(TAPSE), myocardial performance index (MPI). Doppler echocardiography was used to measure tricuspid value diastolic blood flow velocity (E, A peak), this Dopplor measurement of tricuspid annulus diastolic velocity (e' and a'). The clinical features, interventional treatment, postoperative cardiovascular adverse events and average hospital stay were observed. Results Patients in the non-CCC group had lower TAPSE and RVFAC and a higher MPI, E/A ratio and E/e' ratio, it was suggested that the right ventricular systolic and diastolic function of non-CCC group were lower than those in the CCC group(P<0.05). Comparison of the two groups of interventional surgery, severe arrhythmia occurred in 0 cases in the CCC group and 8 cases(44.4%) in the non-CCC group, the difference was statistically significant(P<0.05). Postoperative severe arrhythmia occurred in the CCC group was 0 case and 7 cases(38.9%) in the non-CCC group, the difference was statistically significant(P<0.05). Comparison of the average number of hospital days in both groups, the average length of stay was longer in non-CCC group(P<0.05). Conclusion In patients of RCA-CTO combined with OIWMI, the poorly developed coronary collaterals have worse RV functions. Preoperative two-dimensional echocardiography can be used to evaluate the difference between the CCC group and non-CCC group and has a certain clinical significance.

Key words: echocardiography, right coronary artery chronic total occlusion(RCA-CTO), old inferior wall myocardial infarction(OIWMI), right ventricular function

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