Single aortic cross-clamp technique in coronary surgery: a prospective randomized study

Area of Science:

• Cardiovascular Surgery
• Neurology

Background:

• Conventional myocardial revascularization often uses crystalloid cardioplegia and partial aortic clamps.
• The efficacy of combining blood cardioplegia with a single aortic cross-clamp technique for enhanced cardiac and cerebral protection requires further investigation.

Purpose of the Study:

• To evaluate the hypothesis that combining blood cardioplegia with a single aortic cross-clamp technique improves myocardial and cerebral protection during myocardial revascularization.
• To compare the outcomes of this combined technique against conventional methods in a prospectively randomized study.

Main Methods:

• A prospectively randomized study involving 100 patients undergoing myocardial revascularization.
• Group I (n=55) received crystalloid cardioplegia and conventional partial aortic clamping.
• Group II (n=45) received blood cardioplegia combined with a single aortic cross-clamp technique, despite a higher preoperative risk score.

Main Results:

• Group II experienced significantly longer aortic cross-clamp times (59 vs. 47 min).
• Group I showed a correlation between surgical ischemia duration and myocardial necrosis, and had a significantly higher incidence of combined mortality and morbidity events (adverse events).
• Neurological lesions were exclusively observed in Group I patients.

Conclusions:

• The combined use of blood cardioplegia and single aortic cross-clamp technique may offer enhanced myocardial and cerebral protection during myocardial revascularization.
• Further research with larger patient cohorts is necessary to substantiate these findings.