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Risk of surgery following recent myocardial infarction
Masha Livhits1, Clifford Y Ko, Michael J Leonardi
1Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA 90509, USA.
Insights
A recent myocardial infarction (MI) significantly increases risks for postoperative MI and mortality. Delaying surgery for at least 8 weeks and optimizing medical care are recommended strategies for patients with recent MI.
Area of Science:
- Cardiology
- Surgical Outcomes
- Public Health
Background:
- Recent myocardial infarction (MI) is a known risk factor for surgical complications.
- Previous data may not reflect current clinical management advancements.
Purpose of the Study:
- To evaluate the impact of recent myocardial infarction (MI) on outcomes after non-cardiac surgery.
- To assess the relationship between the timing of surgery post-MI and patient outcomes.
Main Methods:
- Retrospective analysis of 563,842 patients undergoing major surgeries (hip, cholecystectomy, colectomy, AAA repair, amputation) from 1999-2004.
- Comparison of postoperative 30-day MI rates, 30-day mortality, and 1-year mortality between patients with and without a recent MI.
- Utilized univariate and multivariate logistic regression with bootstrapping for relative risk estimation.
Main Results:
- Postoperative MI and mortality rates decreased significantly as the time from MI to surgery increased.
- MI within 30 days of surgery was associated with substantially higher risks of postoperative MI, 30-day mortality, and 1-year mortality.
Conclusions:
- Recent MI remains a critical risk factor for adverse outcomes after surgery.
- Delaying elective surgery for at least 8 weeks post-MI and prioritizing medical optimization are crucial strategies.
Objective:
We aimed to assess the impact of recent myocardial infarction (MI) on outcomes after subsequent surgery in the contemporary clinical setting.
Background:
Prior work shows that a history of a recent MI is a risk factor for complications following noncardiac surgery. However, this data does not reflect current advances in clinical management.
Methods:
Using the California Patient Discharge Database, we retrospectively analyzed patients undergoing hip surgery, cholecystectomy, colectomy, elective abdominal aortic aneurysm repair, and lower extremity amputation from 1999 to 2004 (n = 563,842). Postoperative 30-day MI rate, 30-day mortality, and 1-year mortality were compared for patients with and without a recent MI using univariate analyses and multivariate logistic regression. Relative risks (RR) with 95% confidence intervals were estimated using bootstrapping with 1000 repetitions.
Results:
Postoperative MI rate for the recent MI cohort decreased substantially as the length of time from MI to operation increased (0-30 days = 32.8%, 31-60 days = 18.7%, 61-90 days = 8.4%, and 91-180 days = 5.9%), as did 30-day mortality (0-30 days = 14.2%, 31-60 days = 11.5%, 61-90 days = 10.5%, and 91-180 days = 9.9%). MI within 30 days of an operation was associated with a higher risk of postoperative MI (RR range = 9.98-44.29 for the 5 procedures), 30-day mortality (RR range, 1.83-3.84), and 1-year mortality (RR range, 1.56-3.14).
Conclusions:
A recent MI remains a significant risk factor for postoperative MI and mortality following surgery. Strategies such as delaying elective operations for at least 8 weeks and medical optimization should be considered.
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