Abstract
BackgroundCoronary artery bypass graft (CABG) surgery is an effective therapeutic strategy for coronary heart disease (CHD). Myocardial longitudinal strain echocardiography with 2D speckle tracking could obtain ventricular function with better accuracy and reliability than the left ventricular ejection fraction.The aim of the study was to assess changes in left ventricular function in patients before and after surgical revascularization for a 24-month period of observation, using echocardiography with speckle tracking strain imaging. We searched for echocardiographic predictors of poor early and long-term outcome after CABG.MethodsWe enrolled 69 patients scheduled for elective coronary bypass grafting. Patients were divided into groups based on pre-operative systolic and diastolic parameters, depending on the GLS value and the E’ Lat and E/E’ value. The correlation between these parameters and early and long-term outcomes was analyzed.ResultsPreoperative EF was preserved in 86, 95% (60) patients. Pre-operative reduced GLS was observed in 73.91% (51) of patients and severely reduced in 31.88% (22).In the first post-operative 6-month period, we observed a significant decrease in the GLS. The GLS was a predictor of early postoperative outcome for intubation time, the inotropes use and length of ICU stay. Diastolic dysfunction was a predictor of the greater inotrope requirements.ConclusionsGlobal longitudinal strain and diastolic dysfunction parameters are a good predictors of worse early outcome after CABG.
Highlights
Coronary artery bypass graft (CABG) surgery is an effective therapeutic strategy for coronary heart disease (CHD)
Patient characteristics 69 patients (55 male, 79.71%), 65 (13) years old undergoing elective coronary artery bypass grafting were included in the two-year period of observation time
Our study showed that global longitudinal strain (GLS) was reduced before revascularization in the majority of patients, despite a preserved left ventricular ejection fraction
Summary
Coronary artery bypass graft (CABG) surgery is an effective therapeutic strategy for coronary heart disease (CHD). Myocardial longitudinal strain echocardiography with 2D speckle tracking could obtain ventricular function with better accuracy and reliability than the left ventricular ejection fraction. The aim of the study was to assess changes in left ventricular function in patients before and after surgical revascularization for a 24-month period of observation, using echocardiography with speckle tracking strain imaging. Coronary artery bypass graft (CABG) surgery is an effective therapeutic strategy for CHD which improves clinical symptoms and reduces the risk of sudden cardiac death. In recent studies that used magnetic resonance imaging (MRI), the strain was demonstrated to measure ventricular function with better accuracy and reliability than the left ventricular ejection fraction. Et al showed that in patients with poor acoustic windows, strain values correlated more closely with MRI measures of ventricular function than traditional EF [4]
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