Related Experiment Videos
Beta blockers for elective surgery in elderly patients: population based, retrospective cohort study
Donald Redelmeier1, Damon Scales, Alexander Kopp
1Sunnybrook and Women's College Health Sciences Centre, G-151, 2075 Bayview Ave, Ontario, Canada M4N 3M5. DAR@ICES.ON.CA
BMJ (Clinical Research Ed.)
|October 8, 2005
Summary
Elderly patients undergoing surgery had a lower risk of heart attack or death when taking atenolol (long-acting beta blocker) compared to metoprolol (short-acting beta blocker). This suggests differences in beta blocker choice may impact perioperative cardiac risk.
Area of Science:
- Cardiology
- Geriatric Medicine
- Pharmacology
Background:
- Beta-blockers are commonly used in patients undergoing surgery.
- The choice between long-acting and short-acting beta-blockers may influence perioperative outcomes.
- Elderly patients undergoing elective surgery are at increased risk for cardiac events.
Purpose of the Study:
- To compare the perioperative cardiac risk between atenolol (long-acting beta blocker) and metoprolol (short-acting beta blocker) in elderly patients undergoing elective surgery.
- To determine if these beta-blockers are associated with equivalent reductions in risk.
Main Methods:
- Population-based, retrospective cohort analysis.
- Included over 37,000 patients aged 65+ undergoing elective surgery in Ontario, Canada, over a decade.
- Primary outcome measure was death or myocardial infarction.
Main Results:
- A significantly lower rate of myocardial infarction or death was observed in patients receiving atenolol (2.5%) compared to metoprolol (3.2%) (P < 0.001).
- This decreased risk with atenolol remained significant after adjusting for demographic, medical, and surgical factors.
- The benefit of atenolol was also observed when compared to other long-acting versus short-acting beta-blockers and was most pronounced in the immediate postoperative period.
Conclusions:
- Patients receiving metoprolol have a higher perioperative cardiac risk than those receiving atenolol.
- This difference may be attributed to potential acute withdrawal effects of short-acting beta-blockers like metoprolol.
- The choice of beta-blocker, specifically long-acting versus short-acting, is an important consideration for perioperative risk management in elderly surgical patients.