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Different CABG methods in patients with chronic obstructive pulmonary disease
1Department of Cardiovascular Surgery, Koşuyolu Heart and Research Hospital, Istanbul, Turkey. mustafaguler@superonline.com
Insights
Off-pump coronary artery bypass grafting (CABG) techniques, including beating heart surgery and minimally invasive direct coronary artery bypass grafting (MIDCABG), improve pulmonary function in patients with chronic obstructive pulmonary disease (COPD) compared to standard CABG.
Area of Science:
- Cardiology
- Thoracic Surgery
- Pulmonary Medicine
Background:
- Pulmonary dysfunction is a significant complication following coronary artery bypass grafting (CABG).
- Patients with chronic obstructive pulmonary disease (COPD) face heightened risks during cardiac surgery.
Purpose of the Study:
- To evaluate the impact of different CABG techniques on pulmonary function in patients with severe COPD.
- To compare standard CABG, beating heart surgery, and minimally invasive direct coronary artery bypass grafting (MIDCABG) in this patient population.
Main Methods:
- A randomized study involving 58 patients with severe COPD undergoing elective isolated coronary surgery.
- Patients were divided into three groups: standard CABG (n=18), beating heart surgery (n=19), and MIDCABG (n=21).
- Pulmonary function was assessed preoperatively and postoperatively, with analysis of extubation time, ICU stay, and respiratory morbidity.
Main Results:
- Minimally invasive direct coronary artery bypass grafting (MIDCABG) resulted in the earliest extubation times (p < 0.001).
- Intensive care unit (ICU) stay was significantly shorter for beating heart surgery and MIDCABG groups compared to standard CABG (p < 0.05).
- While atelectasis was the most common morbidity, forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) showed significant postoperative decline only in the standard CABG group.
Conclusions:
- Off-pump surgical procedures, specifically beating heart surgery and MIDCABG, offer significant advantages over on-pump CABG for patients with COPD.
- These techniques mitigate the pulmonary side effects associated with cardiopulmonary bypass (CPB) and sternotomy.
- Choosing off-pump methods can preserve pulmonary function and reduce postoperative complications in COPD patients undergoing coronary artery bypass surgery.
Background:
Pulmonary dysfunction is still a major problem in coronary artery bypass grafting (CABG). The purpose of this randomized study was to determine the effect of different CABG techniques on pulmonary function.
Methods:
Fifty eight patients with severe obstructive pulmonary disease had elective isolated coronary surgery. The surgical methods for the patients with chronic obstructive pulmonary disease (COPD) were standard CABG in 18 patients (group 1), beating heart surgery in 19 patients (group 2), and minimally invasive direct coronary artery bypass grafting (MIDCABG) in 21 patients (group 3).
Results:
The earliest extubation time was from group 3 (p < 0.001). The average stay in the intensive care unit was significantly longer in group 1 (2.6 +/- 1.5 days) than in groups 2 (1.4 +/- 0.8 days) and 3 (1.1 +/- 0.8 days) (p < 0.05). The most prevalent respiratory morbidity was atelectasis that developed in 6 patients from group 1, in 2 patients from group 2, and in 3 patients from group 3. Forced expiratory volumes in 1 second (FEV1) obtained in the second postoperative month were significantly lower than preoperative values only in group 1 (p < 0.05). Forced vital capacity (FVC) values were significantly lower than the preoperative values in all three groups (p < 0.05).
Conclusions:
Off-pump bypass surgical procedures are more advantageous than on-pump methods for patients with COPD. These patients can be operated on using the beating heart technique or by using MIDCABG to prevent side effects of CPB on pulmonary function and effects of sternotomy.