Related Experiment Videos
Blood cardioplegia with warm reperfusion versus intermittent aortic crossclamping in myocardial revascularization.
L R Gerola1, S A Oliveira, L F Moreira
1Instituto do Coração da Faculdade de Medicina da Universidade de São Paulo, Brazil.
Insights
Comparing two heart surgery methods, blood cardioplegia and intermittent aortic crossclamping, found similar efficiency in myocardial revascularization. Both techniques demonstrated comparable hemodynamic improvements and low hospital mortality rates in patients undergoing coronary artery bypass grafting.
Area of Science:
- Cardiovascular Surgery
- Cardiac Anesthesia
- Myocardial Protection
Background:
- Coronary artery bypass grafting (CABG) necessitates effective myocardial protection.
- Two primary methods, blood cardioplegia and intermittent aortic crossclamping, are employed.
- Comparing their efficiency is crucial for optimizing surgical outcomes.
Purpose of the Study:
- To compare the efficiency of blood cardioplegia with warm reperfusion (aspartate-glutamate enriched) versus intermittent aortic crossclamping.
- To evaluate hemodynamic parameters and hospital mortality as key endpoints.
- To determine the optimal myocardial protection strategy in CABG.
Main Methods:
- Randomized controlled trial involving 60 patients undergoing CABG.
- Group I (30 patients): Blood cardioplegia with warm reperfusion.
- Group II (30 patients): Intermittent aortic crossclamping.
- Monitoring of hemodynamic parameters and hospital mortality.
Main Results:
- Similar increases in cardiac index observed postoperatively in both groups.
- No statistically significant differences in hemodynamic recovery between methods.
- Comparable hospital mortality rates: 3.3% in the cardioplegia group and 3.3% in the crossclamping group.
- Shorter extracorporeal circulation and aortic crossclamping times in the intermittent aortic crossclamping group (p < 0.05).
Conclusions:
- Both blood cardioplegia and intermittent aortic crossclamping are similarly effective for myocardial protection during CABG.
- Intermittent aortic crossclamping may offer advantages in reduced cross-clamping and circulation times.
- Further research may explore long-term outcomes and specific patient populations.
Abstract:
To compare the efficiency of two methods of myocardial protection--blood cardioplegia and warm reperfusion with aspartate-glutamate enrichment of the solution versus intermittent aortic crossclamping--we randomized 60 patients for coronary artery bypass grafting. Hemodynamic parameters and hospital mortality were the end points. Pathologic antecedents and preoperative clinical conditions were similar in both group I (blood cardioplegia, 30 patients) and group II (aortic crossclamping, 30 patients). An average of 2.9 grafts per patient were performed in group I and 3.1 in group II. Duration of extracorporeal circulation was 100 +/- 28 minutes in group I and 85 +/- 23 minutes in group II (p < 0.05). The total time of aortic crossclamping was 62.8 +/- 24.5 minutes in group I and 44.3 +/- 14.9 minutes in group II (p < 0.05). There were comparable increases in cardiac index in group I and group II from the preoperative period to the first postoperative day, but none of these changes reached statistical significance. There were two deaths, one in the cardioplegia group (3.3%) and another in the intermittent aortic crossclamping group (3.3%). In conclusion, in myocardial revascularization, intermittent aortic crossclamping and blood cardioplegia with warm reperfusion enriched with aspartate-glutamate solution are methods of similar efficiency.