Coronary artery bypass without cardiopulmonary bypass

Area of Science:

• Cardiovascular Surgery
• Cardiac Anesthesia
• Thoracic Surgery

Background:

• Limited published data exists on off-pump coronary artery bypass grafting (CABG).
• Assessing the safety and efficacy of off-pump CABG compared to traditional on-pump procedures is crucial for surgical decision-making.

Purpose of the Study:

• To describe the technique for performing off-pump CABG.
• To evaluate the safety of off-pump CABG regarding mortality and morbidity compared to on-pump CABG.

Main Methods:

• A retrospective study comparing 220 patients undergoing off-pump CABG with 220 matched controls who had on-pump CABG.
• Matching criteria included number of grafts, left ventricular function, and date of operation.
• Comparison focused on mortality and ten indicators of morbidity, including subgroup analyses.

Main Results:

• No statistically significant difference in mortality was observed between off-pump (1.4%) and on-pump (2.4%) CABG groups.
• Off-pump CABG patients required significantly fewer blood transfusions (72.7% not transfused vs. 54.6% on-pump).
• Low-output states occurred less frequently in the off-pump group (5.5% vs. 12.7% on-pump).

Conclusions:

• Off-pump CABG is a safe procedure with comparable mortality to on-pump CABG.
• Off-pump CABG offers benefits, including reduced blood transfusion requirements and lower incidence of low-output states.
• Further research is needed to identify optimal patient subgroups for off-pump versus on-pump procedures.