Administering cold cardioplegia in patients undergoing coronary artery bypass grafting

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia
• Myocardial Protection

Background:

• Hypothermic cardioplegia is standard for myocardial protection during CABG.
• Uneven cooling can occur distally to obstructed coronary arteries.
• "Warm" areas may compromise myocardial protection during CABG.

Purpose of the Study:

• To address uneven myocardial cooling during CABG.
• To evaluate a novel cardioplegic infusion technique.
• To achieve uniform myocardial temperatures for improved cardiac protection.

Main Methods:

• Simultaneous myocardial temperature measurements were used.
• A technique of combined aortic root and intracoronary cardioplegic infusion was developed.
• The technique was applied in patients undergoing CABG.

Main Results:

• "Warm" myocardial areas were identified in some patients.
• The combined infusion technique achieved prompt cooling of these areas.
• Uniform myocardial temperatures between 5-8°C were consistently achieved.

Conclusions:

• Combined aortic root and intracoronary cardioplegia is effective.
• This technique ensures uniform myocardial cooling during CABG.
• Improved myocardial protection is anticipated with this method.