Author + information
- Received July 29, 2011
- Revision received September 26, 2011
- Accepted October 17, 2011
- Published online August 28, 2012.
- Tullio Palmerini, MD⁎,
- Giuseppe Biondi-Zoccai, MD†,
- Letizia Bacchi Reggiani, MSc⁎,
- Diego Sangiorgi, MStat⁎,
- Laura Alessi, MD⁎,
- Stefano De Servi, MD‡,
- Angelo Branzi, MD⁎ and
- Gregg W. Stone, MD§,⁎ ()
- ↵⁎Reprints requests and correspondence:
Dr. Gregg W. Stone, The Cardiovascular Research Foundation, Columbia University Medical Center, New York-Presbyterian Hospital, 111 East 59th Street, 11th Floor, New York, New York 10022
Objectives This study sought to determine whether coronary artery bypass graft (CABG) surgery is associated with an increased risk of stroke compared with percutaneous coronary intervention (PCI).
Background Some, but not all, randomized trials have reported increased rates of stroke with CABG compared with PCI. However, all these studies were powered insufficiently to examine differences in the risk of stroke reliably.
Methods We performed a meta-analysis of 19 trials in which 10,944 patients were randomized to CABG versus PCI. The primary end point was the 30-day rate of stroke. We also determined the rate of stroke at the midterm follow-up and investigated whether there was an interaction between revascularization type and the extent of coronary artery disease on the relative risk of stroke.
Results The 30-day rate of stroke was 1.20% after CABG compared with 0.34% after PCI (odds ratio: 2.94, 95% confidence interval: 1.69 to 5.09, p < 0.0001). Similar results were observed after a median follow-up of 12.1 months (1.83% vs. 0.99%, odds ratio: 1.67, 95% confidence interval: 1.09 to 2.56, p = 0.02). The extent of coronary artery disease (single vessel vs. multivessel vs. left main) did not affect the relative increase in the risk of stroke observed with CABG compared with PCI at either 30 days (p = 0.57 for interaction) or midterm follow-up (p = 0.08 for interaction). Similar results were observed when the outcomes in 33,980 patients from 27 observational studies were analyzed.
Conclusions Coronary revascularization by CABG compared with PCI is associated with an increased risk of stroke at 30 days and at the mid-term follow-up.
Dr. Biondi-Zoccai has received speaker honoraria from Abbott Vascular, Boston Scientific, Cordis, and Medtronic. Dr. Stone is a consultant to Abbott Vascular, Boston Scientific, and Medtronic. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
- Received July 29, 2011.
- Revision received September 26, 2011.
- Accepted October 17, 2011.
- American College of Cardiology Foundation