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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
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Left Atrial Volume and Post-Operative Atrial Fibrillation after Aortic Valve Replacement
Yeruva Madhu Reddy1, Ruby Satpathy1, Xuedong Shen1
1The Cardiac Center of Creighton University, Creighton University, Omaha, Nebraska, USA.
Journal of Atrial Fibrillation
|May 13, 2017
Summary
Left atrial volume index is an excellent predictor of post-operative atrial fibrillation (POAF) after aortic valve replacement for aortic stenosis. Preoperative measurement can identify high-risk patients for targeted preventive interventions.
Area of Science:
- Cardiology
- Cardiac Surgery
- Medical Imaging
Background:
- Post-operative atrial fibrillation (POAF) is a frequent complication after valve surgery, increasing patient morbidity and mortality.
- Existing predictors for POAF offer only moderate accuracy.
- Left atrial volume (LAV) index is a potential marker for POAF risk, particularly in aortic stenosis (AS).
Purpose of the Study:
- To evaluate the predictive accuracy of left atrial volume (LAV) index for post-operative atrial fibrillation (POAF) in patients undergoing aortic valve replacement (AVR) for aortic stenosis (AS).
Main Methods:
- Retrospective analysis of 139 patients with no prior atrial fibrillation (AF) undergoing AVR for AS.
- Statistical analysis including univariate and multivariate assessments to identify predictors of POAF.
- Calculation of sensitivity and specificity for LAV index in predicting POAF.
Main Results:
- POAF occurred in 44% of patients, associated with longer hospital stays.
- Left atrial volume (LAV) index was the sole significant independent predictor of POAF in multivariate analysis.
- A LAV index greater than 46 cc/m2 predicted POAF with 92% sensitivity and 77% specificity.
Conclusions:
- Left atrial volume (LAV) index is a highly accurate preoperative predictor of post-operative atrial fibrillation (POAF) in patients undergoing aortic valve replacement (AVR) for aortic stenosis (AS).
- This metric can guide the selection of patients for targeted preventive strategies to reduce POAF incidence.
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