Key result
Off-pump coronary artery bypass did not significantly reduce atrial fibrillation compared to on-pump bypass in patients with left ventricular dysfunction (OR 0.77; 95% CI 0.58-1.02; p=0.07).
Why the study?
Does off-pump coronary artery bypass reduce atrial fibrillation, blood loss, and transfusion requirements in patients with left ventricular dysfunction compared to on-pump bypass?
Meta-Analysis (n=7,454)
Does off-pump coronary artery bypass reduce atrial fibrillation, blood loss, and transfusion requirements in patients with left ventricular dysfunction compared to on-pump bypass?
Odds Ratio: 0.77 (95% CI 0.58–1.02)
p-value: p=0.07
In patients with left ventricular dysfunction, off-pump CABG significantly reduces bleeding and transfusion requirements compared to on-pump CABG, but does not significantly reduce postoperative atrial fibrillation.
Off-pump CABG does not reduce AF in LV dysfunction; challenges assumptions of broad benefit and leaves open targeted trials on bleeding endpoints.
Despite advancements in surgical technique, intensive care methods and pharmaceutical prophylaxis atrial fibrillation (AF) after on-pump coronary artery bypass remains common. Transfusion, blood loss, and cardiopulmonary bypass (CPB) have been identified as risk factors for AF and adverse outcomes such as early mortality. This study examines outcomes in patients with left ventricular dysfunction after revascularization with and without CPB. A systematic literature review identified 22 studies including 7,454 patients. Meta-analysis through subgroup analysis of the highest-quality studies revealed that the off-pump coronary artery bypass (OPCAB) technique is associated with a significantly lower incidence of blood loss, transfusion requirement, reoperation for bleeding, and length of stay. There was also a reduction in the incidence of AF in the OPCAB group but this was not statistically significant (odds ratio = 0.77, 95% confidence interval 0.58-1.02, p = 0.07). The results strengthen research suggesting that CPB has a damaging effect on hemostasis and subsequent transfusion requirements in this patient group. More research is required to assess the association between OPCAB and AF in patients with ventricular dysfunction.
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Jarral et al. (2012) conducted a meta-analysis in Left ventricular dysfunction (n=7,454). Off-pump coronary artery bypass (OPCAB) vs. On-pump coronary artery bypass (CPB) was evaluated on Incidence of atrial fibrillation (OR 0.77, 95% CI 0.58-1.02, p=0.07). Off-pump coronary artery bypass did not significantly reduce atrial fibrillation compared to on-pump bypass in patients with left ventricular dysfunction (OR 0.77; 95% CI 0.58-1.02; p=0.07).
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