Related Experiment Video
Updated: May 12, 2026
Surgical Porcine Model of Chronic Myocardial Ischemia Treated by Exosome-laden Collagen Patch and Off-pump Coronary Artery Bypass Graft
Published on: September 15, 2023
Emergency coronary artery bypass grafting using minimized versus standard extracorporeal circulation--a propensity
Michael Ried1, Assad Haneya, Philipp Kolat
1Department of Cardiothoracic Surgery, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, Regensburg, 93053, Germany. micha.ried@t-online.de
Insights
Minimally extracorporeal circulation (MECC) did not show significant differences in 30-day mortality or other outcomes compared to conventional extracorporeal circulation (CECC) in emergency coronary artery bypass grafting (CABG). Further analysis is warranted to confirm these findings.
Area of Science:
- Cardiovascular Surgery
- Thoracic Surgery
- Medical Devices
Background:
- The use of minimized extracorporeal circulation (MECC) in emergency coronary artery bypass grafting (CABG) remains a subject of debate.
- Assessing the impact of MECC versus conventional extracorporeal circulation (CECC) on patient outcomes is crucial for clinical decision-making.
Purpose of the Study:
- To compare the efficacy and safety of MECC versus CECC in patients undergoing emergency CABG.
- To evaluate the impact of MECC on 30-day mortality, intensive care unit stay, hospital stay, and other postoperative complications.
Main Methods:
- A retrospective study included 348 patients undergoing emergency CABG between January 2005 and December 2010.
- Propensity score matching was employed to create comparable groups of 100 patients each for MECC and CECC.
- The primary outcome was 30-day mortality, with secondary outcomes including ICU stay, hospital stay, and complication rates.
Main Results:
- Unadjusted 30-day mortality was significantly lower in the MECC group (6.9%) compared to the CECC group (14.8%).
- After propensity score matching, no significant differences in 30-day mortality (ATT: -1.0%) were observed between MECC and CECC groups.
- No significant differences were found in intensive care unit stay, hospital stay, low cardiac output syndrome, or other postoperative complications between the two groups.
Conclusions:
- This study found no significant differences in survival or other outcomes between MECC and CECC for emergency CABG when adjusted for patient characteristics.
- The findings suggest that MECC may not offer a significant advantage over CECC in this high-risk patient population.
- Further research is recommended to validate these results and explore potential benefits of MECC in specific subgroups.
Background:
The impact of minimized extracorporeal circulation (MECC) for emergency revascularization remains controversial.
Methods:
A total of 348 patients underwent emergency CABG with MECC (n=146) or conventional extracorporeal circulation (CECC; n=175) between January 2005 and December 2010. Using propensity score matching after binary logistic regression, 100 patients, who underwent CABG with MECC could be matched with 100 patients, who underwent CABG with CECC. Primary outcome was 30-day mortality.
Results:
Unadjusted 30-day mortality was 14.8% in patients with CECC and 6.9% in those with MECC (mean difference -7.9%; p=0.03). The adjusted mean difference (average treatment effect of the treated, ATT) after matching was -1.0% (95% CI -8.6 to 7.6; p=1.0). Intensive care unit stay (adjusted mean difference 1.0; 95% CI -0.2 to 3.2; p=0.70) and hospital stay (adjusted mean difference 1.0; 95% CI -2.0 to 3.6; p=0.40) did not show significant differences between both groups. The adjusted mean difference for postoperative low cardiac output syndrome was -1.1% (95% CI -7.3 to 7.1; p=0.83) without significant differences between CECC and MECC. Postoperative mechanical ventilation time, drain loss, postoperative rethoracotomy, postoperative neurological events, new onset renal replacement therapy and respiratory failure also had insignificant average treatment effects of the treated. In addition, all average treatment effects (ATEs) did not significantly differ between both groups.
Conclusion:
Using propensity score estimation and matching, we did not observe significant differences in terms of survival and further outcomes in patients who undergo emergency CABG with CECC or MECC, but our results call for further analysis.
