Meta-Analysis of Perioperative Stroke and Mortality in CABG Patients With Carotid Stenosis
Priya Roy1, Indraneel Brahme1, Rajiv P Reddy1
1Departments of Neurological Surgery.
Insights
Patients undergoing coronary artery bypass grafting (CABG) with perioperative stroke face significantly higher mortality risks. This highlights the critical need for enhanced stroke monitoring and management during and after CABG surgery.
Area of Science:
- Cardiovascular Surgery
- Neurology
- Critical Care Medicine
Background:
- Coronary artery bypass grafting (CABG) is a standard treatment for coronary heart disease.
- CABG surgery carries risks, including stroke and mortality.
- The direct link between perioperative stroke and mortality following CABG requires systematic investigation.
Purpose of the Study:
- To systematically examine the relationship between perioperative stroke and mortality in patients undergoing CABG.
- To quantify the mortality risk associated with stroke in the perioperative period after CABG.
Main Methods:
- A systematic literature search was conducted on online databases for studies on mortality and stroke after CABG in patients with carotid stenosis.
- Six studies, comprising 3786 patients, were included in the meta-analysis.
- Data were sourced from peer-reviewed literature, primarily from single-institution hospitals.
Main Results:
- The incidence of stroke in CABG patients with significant carotid stenosis was 2.1%.
- Patients who died within 30 days of CABG were 7.3 times more likely to have experienced a perioperative stroke.
- The 30-day mortality rate was 14.4% for stroke patients versus 2.3% for non-stroke patients.
Conclusions:
- A significant association exists between perioperative stroke and mortality in patients undergoing CABG.
- Improved perioperative monitoring, screening, and treatment strategies for stroke are essential.
- These findings underscore the importance of proactive stroke management to reduce mortality after CABG.
Background:
Coronary artery bypass grafting (CABG) is a proven approach in the treatment of coronary heart disease, but the surgery has several complications, including stroke and death. Though it has been established that perioperative stroke is associated with higher rates of long-term mortality, the relationship between stroke and mortality in the perioperative period has not yet been systematically examined.
Methods:
Online databases of peer-reviewed literature were searched to retrieve articles concerning mortality and stroke after CABG in patients with carotid stenosis. Six studies (n=3786) were included for analysis. This study was conducted at a single University hospital system, University of Pittsburgh Medical Center, on patients who underwent CABG. The data obtained from peer-reviewed literature originated from several sources, primarily single institution hospitals.
Results:
Consistent with current literature, the incidence of stroke in CABG patients with significant carotid stenosis was 2.1%. Data were further analyzed to generate a summary odds ratio of stroke-related mortality after CABG, which showed that patients who died within 30 days of CABG were 7.3 times more likely to have had a perioperative stroke (95% confidence interval, 4.1-13.2). The 30-day mortality rate among perioperative stroke victims was 14.4% versus 2.3% for nonstroke patients.
Conclusions:
Together, these data suggest an association between stroke and mortality in the perioperative period in patients undergoing CABG, demonstrating a need for improved monitoring, screening, and treatment of stroke before, during, and shortly after surgery.
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