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Complex valve operations: antegrade versus retrograde cardioplegia?
W R Chitwood1, C L Wixon, T O Norton
1Department of Surgery, East Carolina University School of Medicine, Greenville, North Carolina 27858, USA.
Insights
Combined antegrade and retrograde cold blood cardioplegia offers excellent myocardial protection for complex cardiac surgeries with long aortic cross-clamp times. This technique ensures rapid arrest and uniform distribution, leading to favorable patient outcomes.
Area of Science:
- Cardiovascular Surgery
- Cardiac Anesthesia
- Myocardial Protection
Background:
- Complex cardiac procedures require effective myocardial protection during aortic cross-clamping.
- Prolonged cross-clamp times necessitate advanced protective strategies.
- Combined antegrade and retrograde cold blood cardioplegia is favored for its rapid arrest and uniform distribution.
Purpose of the Study:
- To evaluate the efficacy of combined antegrade and retrograde cold blood cardioplegia in complex cardiac procedures.
- To assess myocardial protection during extended aortic cross-clamp intervals.
- To analyze postoperative cardiac function and mortality rates.
Main Methods:
- Retrospective analysis of 194 consecutive patients undergoing complex cardiovascular procedures (1988-1994).
- Procedures included valve repair/replacement, coronary artery bypass grafting, and aortic arch operations.
- Average cardioplegic arrest time was 113 ± 38.5 minutes.
Main Results:
- Low incidence of new left ventricular dysfunction (3.1%) and no right ventricular dysfunction.
- 75.7% of patients required minimal or no inotropic support postoperatively.
- 30-day mortality rate was 3.1%, with no cardiac failure-related deaths.
Conclusions:
- Combined antegrade and retrograde cardioplegia provides excellent myocardial protection.
- This technique is effective for complex cardiovascular procedures with long arrest times.
- Favorable postoperative outcomes support the use of this cardioplegia strategy.
Background:
Increasingly complex cardiac procedures demand optimal myocardial protective techniques during the requisite interval of aortic cross-clamping. For complex procedures in which prolonged cross-clamp times are anticipated, we favor combined antegrade and retrograde cold blood cardioplegia. Advantages include rapid arrest, uniform distribution, and an uninterrupted operation.
Methods:
We retrospectively evaluated the cases of 194 consecutive patients who underwent complex cardiovascular procedures between January 1988 and October 1994. Procedures performed included valve repair and coronary artery bypass grafting (23.7%), valve replacement and coronary artery bypass grafting (19.1%), complex aortic arch and valve procedures (16.6%), valve repair only (16.5%), reoperative valve (9.8%), and multiple-valve replacements (9.3%). Cardioplegic arrest times averaged 113 +/- 38.5 minutes (range, 52 to 292 minutes).
Results:
Postoperative left and right ventricular function was evaluated using transesophageal echocardiography. The echocardiograms revealed a 3.1% incidence of new left ventricular dysfunction and no case of right ventricular dysfunction. Of the patients evaluated, 75.7% required little (< 3 micrograms.kg-1.min-1 of dopamine hydrochloride) or no inotropic support postoperatively. The 30-day mortality rate was 3.1%, and no death was due to cardiac failure.
Conclusions:
We conclude that myocardial protection using a combined antegrade and retrograde cardioplegia technique permits excellent myocardial protection during complex cardiovascular procedures requiring long arrest times.