Off-pump coronary artery bypass grafting in left ventricular dysfunction

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia
• Cardiology

Background:

• Patients with left ventricular dysfunction (ejection fraction <= 35%) undergoing coronary artery bypass grafting (CABG) represent a high-risk population.
• Conventional CABG involves cardiopulmonary bypass and cardiac arrest, which may carry increased risks in patients with compromised cardiac function.

Purpose of the Study:

• To compare the safety and efficacy of off-pump coronary artery bypass grafting (OPCAB) versus conventional CABG in patients with severely reduced ejection fractions.

Main Methods:

• A randomized trial involving 124 patients with ejection fractions <= 35% between August 2004 and May 2006.
• Patients were assigned to either OPCAB using a tissue stabilizer and single-suture technique or conventional CABG with cardiopulmonary bypass and cardioplegic arrest.
• Preoperative characteristics were similar, with minor differences in age and mitral regurgitation.

Main Results:

• The OPCAB group had significantly fewer vessels grafted (3.09 vs. 3.42).
• OPCAB was associated with significantly lower rates of mortality, morbidity, need for balloon pump support, inotropic usage, gastrointestinal bleeding, renal dysfunction, reintubation, and shorter intensive care and hospital stays.
• The incidence of perioperative myocardial infarction did not differ significantly between the groups.

Conclusions:

• Beating-heart coronary bypass surgery (OPCAB) is a safe and effective alternative for patients with left ventricular dysfunction.
• OPCAB offers significant benefits in terms of reduced complications and resource utilization compared to conventional CABG in this high-risk cohort.