Volume 33, Issue 2 (May 2022)                   Studies in Medical Sciences 2022, 33(2): 131-139 | Back to browse issues page


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Cardiologist, Shariati Hospital, University of Tehran, Tehran, Iran (Corresponding Author) , rezaee.mahrokh@gmail.com
Abstract:   (1346 Views)
Background & Aims: Coronary artery bypass graft surgery (CABG) is evaluated by measuring coronary sinus parameters through angiography or transesophageal echocardiography. However, there is little information about the changes related to these indicators, especially about the changes in the diameter and flow of the coronary sinus through transthoracic echo evaluation. The purpose of this study was to investigate coronary sinus flow in transthoracic echo in the patients with left ventricular ejection fraction (LVEF) more than 45% before and after CABG surgery.
Materials & Methods: In this clinical trial study, 30 patients with coronary heart disease and LVEF greater than 45% who were candidates for CABG were included in the study. Before CABG surgery, patients underwent transthoracic echocardiography, and coronary sinus peak velocity, coronary sinus blood flow (CSBF), and velocity time integral index (VTI) were measured. These values ​​evaluated again after coronary artery grafts and their difference was evaluated. SPSS version 23 software was used for statistical analysis of data and t-test, chi-square test and paired t-test statistical methods were used. P value below 0.05 was considered as significance level.
Results: There was a significant difference between CSBF before (53.93±6.18) and after surgery (58.95±6.75) (P<0.001), which indicates a significant increase in this index after CABG surgery. Also, coronary sinus VTI index (CS-VTI) before surgery was 8.11 ± 0.70 and after surgery was 8.87 ± 0.82 (P<0.001). Coronary sinus diameter index (CSd) was 6.64±0.47 before surgery and 6.65±0.47 after surgery, which change was not significant (P=0.161). Also, the increase in CSBF after surgery adjusted for baseline variables was significant (P<0.001). None of the indicators of sex, age, cardiac risk factors, and the number of coronary arteries involved had significant correlations with CSBF.
Conclusion: The results of this study showed that transthoracic echocardiography significantly improves the amount of CSBF following CABG in these patients, which were completely independent from background information such as demographic characteristics, cardiovascular risk factors, and even the severity of vascular involvement in the coronary artery veins. Improvement in CSBF can occur without changes in coronary sinus diameter.

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Type of Study: case report | Subject: قلب و عروق

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