Beating heart surgery reduces mortality in the reoperative bypass patient

Area of Science:

• Cardiovascular Surgery
• Thoracic Surgery
• Minimally Invasive Cardiac Procedures

Background:

• Reoperative coronary artery bypass grafting (redo-CABG) carries higher risks than primary procedures.
• Conventional redo-CABG often involves cardiopulmonary bypass (CPB), increasing operative hazards.
• Investigating off-pump techniques aims to mitigate risks associated with redo-CABG.

Purpose of the Study:

• To evaluate the safety and efficacy of performing redo-CABG without cardiopulmonary bypass (CPB).
• To compare outcomes of off-pump redo-CABG versus conventional on-pump redo-CABG.
• To determine if off-pump surgery reduces morbidity and mortality in selected reoperative patients.

Main Methods:

• A retrospective analysis of 432 redo-CABG patients from January 1998 to December 2000.
• 153 patients (35%) underwent off-pump redo-CABG, while the remainder had on-pump procedures.
• Univariate analysis compared preoperative risk factors and postoperative complications; Society of Thoracic Surgeons risk algorithm assessed predicted and observed mortality.

Main Results:

• Off-pump redo-CABG showed significantly lower observed mortality (2.61% vs. 9.68%) compared to on-pump (p=0.0065).
• The off-pump group experienced reduced morbidity, including less need for blood products (25% vs. 67%) and shorter ventilation times (4% vs. 14%).
• Hospital stays were shorter for off-pump patients (6.2 days vs. 8.0 days), with no significant differences in perioperative myocardial infarction, stroke, renal failure, or reoperation for bleeding.

Conclusions:

• Coronary artery bypass grafting without CPB is a viable and safer alternative for selected reoperative patients.
• Off-pump techniques significantly decrease mortality and morbidity in the redo-CABG population.
• This approach should be considered to improve outcomes in patients requiring repeat cardiac revascularization.