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Improvement in cardioplegic perfusion technique in single aortic clamping - initial results
Marcelo Luiz Peixoto Sobral1, Sérgio Francisco dos Santos Júnior2, Juliano Cavalcante de Sá3
1Real e Benemérita Associação Portuguesa de São Paulo, São Paulo, SP, Brasil.
Insights
This study introduces an improved technique for myocardial revascularization surgery using single aortic clamping for intermittent perfusion. The method proved safe and effective, with satisfactory clinical outcomes and minimal neurological events in patients.
Area of Science:
- Cardiovascular Surgery
- Cardiac Anesthesia
- Myocardial Protection
Background:
- Standard myocardial protection involves cardioplegic solution infusion.
- Alternative methods include intermittent coronary perfusion with autologous blood.
- Current techniques often require multiple aortic clamp applications.
Purpose of the Study:
- To assess the clinical outcomes of myocardial revascularization surgery.
- To evaluate neurological events using an improved intermittent aortic root perfusion technique.
- This technique utilizes single aortic clamping.
Main Methods:
- Prospective, cross-sectional, observational study.
- Evaluated a novel myocardial management technique involving intermittent aortic root perfusion with single clamping.
- Assessed clinical and laboratory variables in 50 patients undergoing myocardial revascularization surgery.
Main Results:
- Post-surgery CKMB and troponin I levels were within normal limits.
- No patient deaths were recorded.
- One patient experienced a mild neurological disorder; hemodynamic monitoring showed no significant changes.
Conclusions:
- Myocardial revascularization surgery using the improved intermittent aortic root perfusion technique with single clamping is safe.
- The technique facilitates satisfactory clinical results.
- This approach offers a viable alternative for myocardial protection during surgery.
Introduction:
The most common method used for myocardial protection is administering cardioplegic solution in the coronary circulation. Nevertheless, protection may be achieved by intermittent perfusion of the coronary system with patient's own blood. The intermittent perfusion may be performed by multiple sequences of clamping and opening of the aortic clamp or due single clamping and accessory cannulation of the aortic root as in the improved technique proposed in this study, reperfusion without the need for multiple clamping of the aorta.
Objective:
To evaluate the clinical outcome and the occurrence of neurological events in in-hospital patients submitted to myocardial revascularization surgery with the "improved technique" of intermittent perfusion of the aortic root with single clamping.
Methods:
This is a prospective, cross-sectional, observational study that describes a myocardial management technique that consists of intermittent perfusion of the aortic root with single clamping in which 50 patients (mean age 58.5 ± 7.19 years old) have been submitted to the myocardial revasculrization surgery under the proposed technique. Clinical and laboratory variables, pre- and post-surgery, have been assessed.
Results:
The mean peak level of post-surgery CKMB was 51.64 ± 27.10 U/L in the second post-surgery and of troponin I was 3.35 ± 4.39 ng/ml in the fourth post-surgery, within normal limits. No deaths have occurred and one patient presented mild neurological disorder. Hemodynamic monitoring has not indicated any changes.
Conclusion:
The myocardial revascularization surgery by perfusion with the improved technique with intermittent aortic root with single clamping proved to be safe, enabling satisfactory clinical results.
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