Does cardioplegia type affect outcome and survival in patients with advanced left ventricular dysfunction? Results...

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia

Background:

• Controversy exists regarding optimal cardioplegic solutions, temperatures, and delivery methods for myocardial protection.
• The CABG Patch Trial focused on high-risk coronary artery disease patients with ejection fraction <36% to assess interventions with the greatest potential benefit.

Purpose of the Study:

• To compare the efficacy of blood versus crystalloid cardioplegia.
• To evaluate the impact of cardioplegia temperature and delivery route on patient outcomes.
• To determine the effectiveness of combined antegrade and retrograde cardioplegia versus antegrade alone.

Main Methods:

• Patients undergoing coronary artery bypass grafting (CABG) were randomized into the CABG Patch Trial.
• Data on blood cardioplegia use, temperature, and delivery route were collected via surgeon questionnaires.
• Outcomes including operative death, myocardial infarction, shock, conduction defects, and right ventricular dysfunction were analyzed.

Main Results:

• Blood cardioplegia was associated with significantly lower operative death, myocardial infarction, shock, and conduction defects compared to crystalloid cardioplegia.
• Normothermic blood cardioplegia reduced postoperative right ventricular dysfunction compared to cold blood cardioplegia.
• Combined antegrade and retrograde cardioplegia decreased inotrope use, right ventricular dysfunction, and balloon pump use compared to antegrade delivery alone.

Conclusions:

• Blood cardioplegia and combined antegrade/retrograde delivery improve postoperative morbidity in high-risk CABG patients.
• Despite reduced morbidity, no significant differences in early or late survival were observed between the studied cardioplegia strategies.