Left Ventricular Ejection Fraction at 6-Months post Coronary Artery Bypass Graft
Left Ventricular Ejection Fraction after Coronary Artery Bypass Graft
Keywords:
echocardiogram, left ventricular function, coronary artery bypass graft, heart surgeryAbstract
Coronary artery bypass graft (CABG) is widely accepted surgery for coronary artery heart disease treatment. After the surgery, heart function should be improved. Therefore, this experimental study aimed to assess the heart function in CABG patients by evaluating left ventricular compression value (left ventricular ejection fraction: LVEF) before and six months after the surgery. Forty seven CABG patients at the Cardiac Centre, Naresuan University Hospital were enrolled. Simpson's method with echocardiogram was selected to evaluate the LVEF values. This study compared the difference in compression values of left ventricle before and after surgery within the group by paired t test and determined the correlation etween cardiopulmonary bypass time and cross clamp time with left ventricular contraction by Pearson's correlation. Statistical significance level was 0.05. The results demonstrated after surgery, the LVEF values significantly increased to 4.64 times (p < 0.001) when compared with before surgery. In addition, the LVEF values after surgery was not associated with duration of cardiopulmonary bypass time and aortic cross clamp time. Thus, coronary artery bypass surgery improves heart function.
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