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. 2022 Sep 29:9:949259.
doi: 10.3389/fcvm.2022.949259. eCollection 2022.

A novel predictive model for new-onset atrial fibrillation in patients after isolated cardiac valve surgery

Heng Yang  1   2 , Chen Yuan  1   2 , Juesheng Yang  1 , Haiyan Xiang  1 , Wanqi Lan  1   2 , Yanhua Tang  1
Affiliations

A novel predictive model for new-onset atrial fibrillation in patients after isolated cardiac valve surgery

Heng Yang et al. Front Cardiovasc Med. .

Abstract

Background: Postoperative atrial fibrillation (POAF) is a severe complication after cardiac surgery and is associated with an increased risk of ischemic stroke and mortality. The main aim of this study was to identify the independent predictors associated with POAF after isolated valve operation and to develop a risk prediction model.

Methods: This retrospective observational study involved patients without previous AF who underwent isolated valve surgery from November 2018 to October 2021. Patients were stratified into two groups according to the development of new-onset POAF. Baseline characteristics and perioperative data were collected from the two groups of patients. Univariate and multivariate logistic regression analyses were applied to identify independent risk factors for the occurrence of POAF, and the results of the multivariate analysis were used to create a predictive nomogram.

Results: A total of 422 patients were included in the study, of which 163 (38.6%) developed POAF. The Multivariate logistic regression analysis indicated that cardiac function (odds ratio [OR] = 2.881, 95% confidence interval [CI] = 1.595-5.206; P < 0.001), Left atrial diameter index (OR = 1.071, 95%CI = 1.028-1.117; P = 0.001), Operative time (OR = 1.532, 95%CI = 1.095-2.141; P = 0.013), Neutrophil count (OR = 1.042, 95%CI = 1.006-1.08; P = 0.021) and the magnitude of fever (OR = 3.414, 95%CI = 2.454-4.751; P < 0.001) were independent predictors of POAF. The above Variables were incorporated, and a nomogram was successfully constructed with a C-index of 0.810. The area under the receiver operating characteristic curve was 0.817.

Conclusion: Cardiac function, left atrial diameter index, operative time, neutrophil count, and fever were independent predictors of POAF in patients with isolated valve surgery. Establishing a nomogram model based on the above predictors helps predict the risk of POAF and may have potential clinical utility in preventive interventions.

Keywords: nomogram; perioperative; postoperative atrial fibrillation; predictors; valvular heart surgery.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
The nomogram for predicting new-onset atrial fibrillation following isolated cardiac valve surgery. LADi, left atrial diameter index.
FIGURE 2
FIGURE 2
Calibration plots of the nomogram for predicting POAF after isolated valve surgery (A) and the ROC curve for the nomogram (B).
See this image and copyright information in PMC

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