Computed Tomography-Derived Left Ventricular Extracellular Volume Predicts Reverse Remodeling After Catheter Ablation for Atrial Fibrillation

Figures

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  Figure 1. Flow diagram of patient selection and stepwise exclusions. The diagram illustrates the inclusion and exclusion process leading to the final study population of 102 patients.

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  Figure 2. Left ventricular extracellular volume fraction (ECV) analysis on Computed tomography (CT). CT images in a 76-year-old female without reverse remodeling. Regional ECV elevation corresponds to a prior myocardial infarction related to atrial fibrillation–associated coronary embolism. ECV was calculated as the mean value across the 16 left ventricular segments (A). Quantitative ECV analysis was performed using short-axis, two-chamber, and four-chamber views (B–D). In (C,D), the colored dotted lines indicate the locations of short-axis slices used for ECV analysis, and the red dotted line corresponds to the slice displayed in (B).

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  Figure 3. (A) Receiver operating characteristics (ROC) curve of left ventricular extracellular volume fraction (ECV) for predicting reverse remodeling (RR) after atrial fibrillation (AF) ablation. The optimal cutoff value of ECV was 34.8%, with a sensitivity of 87.8% and a specificity of 62.3% (AUC = 0.77, 95% CI 0.673–0.862, p < 0.001). (B) Distribution of CT-derived LV ECV according to RR status. Box-and-whisker plots showing CT-derived LV ECV values in patients with (RR+) and without (RR−). The median, interquartile range, and individual data points are presented. A horizontal dashed line indicates the cutoff value (ECV = 34.8%).