Blood and crystalloid cardioplegia in aortic valve surgery

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia
• Cardioplegia Delivery

Background:

• Aortic valve surgery requires myocardial protection during ischemic periods.
• The choice of cardioplegic solution impacts myocardial recovery and patient outcomes.
• Hypertrophied hearts present unique challenges for myocardial protection.

Purpose of the Study:

• To compare the efficacy of blood cardioplegia versus crystalloid cardioplegia in patients undergoing aortic valve surgery.
• To evaluate the impact of different cardioplegic solutions on myocardial function and injury in patients with hypertrophied hearts.

Main Methods:

• Retrospective review of 86 patients undergoing aortic valve surgery.
• Comparison of outcomes between 43 patients receiving blood cardioplegia and 43 receiving crystalloid cardioplegia.
• Assessment of spontaneous cardiac beating, defibrillation requirements, and creatine kinase-MB (CK-MB) levels.

Main Results:

• Blood cardioplegia resulted in significantly higher rates of spontaneous beating post-cross-clamp release (11 vs. 0; P < 0.001).
• Fewer defibrillations were required in the blood cardioplegia group (2.1 ± 2.6 vs. 3.8 ± 2.2; P < 0.01).
• Lower CK-MB levels were observed on the operation day (65 ± 55 vs. 112 ± 73; P < 0.001) and the following day (53 ± 43 vs. 96 ± 98; P < 0.01) with blood cardioplegia.

Conclusions:

• Blood cardioplegia is a superior vehicle for myocardial protection in patients with hypertrophied hearts undergoing aortic valve surgery.
• The use of blood cardioplegia is associated with improved myocardial recovery and reduced myocardial injury.
• These findings suggest a potential benefit of blood cardioplegia in optimizing surgical outcomes for this patient population.