Coronary artery bypass grafting in patients with left ventricular dysfunction

Area of Science:

• Cardiology
• Cardiovascular Surgery
• Medical Research

Background:

• Coronary artery bypass grafting (CABG) presents challenges for patients with coronary artery disease and left ventricular (LV) dysfunction.
• Evaluating the outcomes of CABG in this specific high-risk patient group is crucial.

Purpose of the Study:

• To assess the results of CABG in patients diagnosed with LV dysfunction.
• To compare clinical and operative variables and mortality rates between patients with preserved and impaired LV ejection fraction (LVEF).

Main Methods:

• A retrospective review of 1,847 patients undergoing primary, isolated CABG between 1991 and 2002.
• Comparison of mortality rates based on LVEF: > or = 35% versus < 35%.

Main Results:

• Patients with LVEF < 35% exhibited higher rates of myocardial infarction, congestive heart failure, and advanced NYHA/angina classes.
• Longer cardiopulmonary bypass times and reduced use of left internal mammary artery (LIMA) grafts were observed in the LVEF < 35% group.
• The LVEF < 35% group experienced significantly higher hospital mortality (6.6% vs 2.2%), major morbidity (23.3% vs 16.1%), and longer hospital stays (25 vs 21 days).

Conclusions:

• Patients with LV dysfunction undergoing CABG face increased mortality and morbidity.
• Despite the elevated risks, CABG can be performed with acceptable results in high-risk patients with LV dysfunction.