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Prevalence and prognostic role of L wave and selected clinical and echocardiographic variables in dogs with atrial fibrillation
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Prevalence and prognostic role of L wave and selected clinical and echocardiographic variables in dogs with atrial fibrillation
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Prevalence and prognostic role of L wave and selected clinical and echocardiographic variables in dogs with atrial fibrillation
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Journal Article
Prevalence and prognostic role of L wave and selected clinical and echocardiographic variables in dogs with atrial fibrillation
2023
Overview
Abstract
Background
Information regarding the frequency of L waves and their prognostic relevance in dogs with secondary atrial fibrillation (AF) is limited.
Hypothesis/Objectives
To determine whether L waves occur and ascertain their prognostic role, as well as the role of other clinical and echocardiographic variables in dogs with AF.
Animals
Fifty-five dogs with AF associated with myxomatous mitral valve disease or dilated cardiomyopathy.
Methods
Retrospective, multicenter observational study. In addition to L waves analysis, other clinical and echocardiographic variables, including type of antiarrhythmic treatment, were evaluated. A survival analysis was performed to test for predictors of cardiac death and all-cause mortality using Cox proportional hazards regression models.
Results
L waves were evident in 33/55 dogs (60%, 95% confidence interval [CI] = 47%-72%) but their presence did not influence outcome. Increased left ventricular end-systolic diameter normalized for body weight (LVSDn) was a significant predictor of both cardiac death (hazard ratio [HR] = 4.41, 95% CI = 1.18-16.54; P = .03) and all-cause mortality (HR = 9.39, 95% CI = 2.49-35.32; P < .001). Heart rate assessed during echocardiography (Echo-HR) represented an additional significant predictor of cardiac death (HR = 1.01, 95% CI = 1.00-1.01; P = .04) and all-cause mortality (HR = 1.01, 95% CI = 1.00-1.01; P = .04).
Conclusions and Clinical Importance
L waves occurred frequently in dogs with AF, but held no prognostic relevance. Conversely, LVSDn and Echo-HR represented independent predictors of negative outcome in these animals.
Publisher
Oxford University Press,John Wiley & Sons, Inc
