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. 2016 Oct 10;134(15):1068–1081. doi: 10.1161/CIRCULATIONAHA.116.022931

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© 2016 The Authors.

Circulation is published on behalf of the American Heart Association, Inc., by Wolters Kluwer. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited.

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Figure 3. — Effect of intrascan rhythm on left ventricular (LV) ejection fraction(EF) and myocardial energetics in patients with atrial fibrillation (AF) before ablation. A, Myocardial energetics determined by the ratio of phosphocreatine to ATP (PCr/ATP) categorized by rhythm during scan and, for patients in sinus rhythm (SR), by Holter-determined AF burden (higher or lower than median). There is no difference between the groups (n=10 for SR with lower AF burden, n=11 for SR with higher AF burden, and n=28 for AF; P=0.84 by 1-way ANOVA). B, LVEF in patients with AF before ablation, similarly categorized. Note the significantly lower EF in those in AF compared with those in SR at the time of the scan, regardless of AF burden (Kruskal-Wallis P=0.0002). Smaller P values stratified by size (**P<0.01, ***P<0.001, ****P<0.0001).