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- W3029658451 abstract "Objective To predict myocardial viability and recovery of regional ventricular function using intraoperative dobutamine stress transesophageal echocardingrapby (DSE) in patients with chronic iachemic left ventricular dysfunction. Methods With institutional review board approval and informed consent 24 NYHA class Ⅱ or Ⅲ patients (19 males, 5 females) aged 50-75 yr, weighing 55-90 kg undergoing elective coronary artery bypass graft (CABG) were studied. Transesophageal echocardiography was used during operation. Regional wall motion (RWM) was semi-quantitatively estimated and scored by 16 segment images as suggested by American Society of Echocardiograpby Committee after tracheal intubation (T_1), during dobutamine infusion (T_2) and after revascularization (T_3) (0=wall motion is augmented, 1 = normal motion, 2,3 = slightly, severely weakened motion, 4 = no motion, 5 = reverse motion). Viabihty was defined as improvement in the motion of regional wall (> 0.5 cm thick) by ≥ 1 score. The accuracy, specificity, sensitivity and positive/negative prediction value (PPV, NPV) of DSE for predicting the myocardial viability after revascularization were assessed. Results The ejection fraction was (39±11) % after tracheal intubation and reached (47±8) % at 3 min of dobutamine infusion and (47±9) % after coronary revascularizatien. The predicted improvement in regional myocardial function by DSE was 36.3% and significantly lower than the segmental recovery of myocardial function after revascularization (43.2%). The sensitivity, specificity, accuracy, PPV and NPV of DSE in predicting myocardial viabihty were 75.3%, 92.7%, 85.3%, 88.4% and 83.5% respectively. Conclusion Intraoperative DSE is effective in assessing the recovery of regional myocardial function after CABG.Key words: Dobutamine; Echocardiography; stress; Myocardium; Tissue survival; Coronary artery bypass" @default.
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- W3029658451 date "2009-10-20" @default.
- W3029658451 modified "2023-09-26" @default.
- W3029658451 title "Prediction of myocardial viability, after coronary revascularization by intraoperative dobutamine stress transesophageal echocardiography" @default.
- W3029658451 doi "https://doi.org/10.3760/cma.j.issn.0254-1416.2009.10.001" @default.
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