Korean Circ J.  2020 Feb;50(2):148-159. 10.4070/kcj.2019.0219.

Clinical Implications of Preoperative Nonvalvular Atrial Fibrillation with Respect to Postoperative Cardiovascular Outcomes in Patients Undergoing Non-Cardiac Surgery

Affiliations
  • 1Department of Cardiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea. mdjunkim@gmail.com
  • 2Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Korea.
  • 3Department of Clinical Epidemiology and Biostatistics, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.

Abstract

BACKGROUND AND OBJECTIVES
Atrial fibrillation (AF) is associated with a higher long-term risk of major cardiovascular events. However, its clinical implications with respect to peri-operative cardiovascular outcomes in patients undergoing non-cardiac surgery is unclear. We tried to examine the association between pre-operative AF and peri-operative cardiovascular outcomes.
METHODS
We retrospectively analyzed data from 26,501 consecutive patients who underwent comprehensive preoperative cardiac evaluations for risk stratification prior to receiving non-cardiac surgery at our center. Preoperative AF was diagnosed in 1,098 patients (4.1%), and their cardiovascular outcomes were compared with those of patients without AF. The primary outcome was the rate of major adverse cardiac and cerebrovascular events (MACCE) during immediate post-surgery period (<30 days).
RESULTS
Patients with AF were older and had higher proportion of male sex, higher rate of extra-cardiac comorbidities, higher CHAâ‚‚DSâ‚‚-VASc score, and higher revised cardiac risk index (RCRI) compared with those without AF. The rate of MACCE was significantly higher in AF patients compared to non-AF patients (4.6% vs. 1.2%, p<0.001). Preoperative AF was associated with higher risk of MACCE, even after multivariable adjustment (odds ratio, 2.97; 95% confidence interval, 2.13-4.07, p<0.001). The relative contribution of AF to MACCE was larger in patients with lower RCRI (p for interaction=0.010). The discriminating performance of RCRI was significantly enhanced by addition of AF.
CONCLUSIONS
In patients undergoing non-cardiac surgery, preoperative AF was associated with a higher risk of peri-operative cardiovascular outcomes.

Keyword

Atrial fibrillation; Stroke; Surgery; Risk assessment

MeSH Terms

Atrial Fibrillation*
Comorbidity
Humans
Male
Retrospective Studies
Risk Assessment
Stroke
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