%0 Journal Article %T Assessment of the Coronary Sinus Diameter after Successful Coronary Artery Bypass Surgery: A Preliminary Echocardiographic Cardiac Perfusion Study %J Iranian Heart Journal %I Iranian Heart Association %Z %A Seyedian, Seyed Masoud %A Adel, Seyed Mohammad Hassan %A Jadbabai, Mohammad Hossein %A Ahmadi, Farzaneh %A Leilizadeh, Mahnaz %D 2019 %\ 10/01/2019 %V 20 %N 4 %P 6-12 %! Assessment of the Coronary Sinus Diameter after Successful Coronary Artery Bypass Surgery: A Preliminary Echocardiographic Cardiac Perfusion Study %K Coronary sinus diameter %K Transthoracic echocardiography %K Coronary artery bypass graft surgery %R %X Background: There is a growing interest in noninvasive methods for the assessment of sufficientcoronary flow after coronary artery bypass graft surgery (CABG) by transthoracicechocardiography (TTE).Methods: We performed this study to evaluate the coronary sinus diameter (CSD), as a confidentmarker of the coronary blood flow, by TTE among patients undergoing CABG. A total of 104elective CABG patients with double, triple, or more coronary artery diseases were enrolled inthis cross-sectional study. Four patients were lost to follow-up because of poorechocardiographic window or death. One day before and 7 days after CABG, all the patientsunderwent TTE.Results: The mean CSD was calculated by averaging the diameters of the middle and terminalsegments of the coronary sinus. The left ventricular ejection fraction (LVEF) was calculatedusing the Simpson methods. The CSD in the middle (11.1%; P < 0.0001) and terminal (10.1%;P < 0.0001) segments was significantly increased after CABG among all the patients.Additionally, the diameter change was most prominent among those with triple vessel disease.Similarly, a significant increase was observed in the mean CSD after CABG (11.3%;P < 0.0001).Conclusions: No significant changes were observed after CABG with respect to the LVEF in the firstpostoperative week. The findings showed that the TTE-determined CSD could be a potentialsurrogate for sufficient coronary perfusion and graft patency after CABG. %U http://journal.iha.org.ir/article_102211_47430de9445046dd344b14c184117d37.pdf