Sevoflurane preconditioning in on-pump coronary artery bypass grafting: a meta-analysis of randomized controlled trials
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Sevoflurane preconditioning (SevoPreC) has been proved to prevent organ ischemia/reperfusion (I/R) injury in various animal models and preclinical studies. Clinical trials on cardioprotection by SevoPreC for adult patients undergoing coronary artery bypass graft (CABG) revealed mixed results. The aim of this meta-analysis was to evaluate the cardiac effect of SevoPreC in on-pump CABG.
Randomized controlled trials (RCT) comparing the cardiac effect of SevoPreC (compared with control) in adult patients undergoing CABG were searched from PubMed, Embase, and the Cochrane Library (up to November 2015). The primary endpoints were postoperative troponin levels. Additional endpoints were CK-MB levels, mechanic ventilation (MV) duration, intensive care unit (ICU) stay, and hospital length of stay (LOS).
Six trials with eight comparisons enrolling a total of 384 study patients reporting postoperative troponin levels were identified. Compared with controls, SevoPreC decreased postoperative myocardial troponin levels [standardized mean difference (SMD) = −0.38; 95 % CI, −0.74 to −0.03; P = 0.04; I 2 = 63.9 %]. However, no significant differences were observed in postoperative CK-MB levels [weighted mean difference (WMD) = −1.71; P = 0.37; I 2 = 37.7 %], MV duration (WMD = −0.53; P = 0.47; I 2 = 0.0 %), ICU stay (WMD = −0.91; P = 0.39; I 2 = 0.9 %), and hospital LOS (WMD = 0.08; P = 0.86; I 2 = 8.0 %).
Available evidence from the present systematic review and meta-analysis suggests that sevoflurane preconditioning may reduce troponin levels in on-pump CABG. Future high-quality, large-scale clinical trials should focus on the early and long-term clinical effect of SevoPreC in on-pump CABG.
KeywordsSevoflurane preconditioning Cardioprotection Coronary artery bypass graft
We thank Dr. Yang Liu, and Dr. Li Ma from Beijing Chest Hospital, for their language-editing assistance.
Compliance with ethical standards
Conflict of interest
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