Figure 1

Myocardial energetics is impaired in patients compared to controls, and does not improve post-ablation ( A ). Representative 31P spectra from a mid-ventricular septal voxel in a control (PCr/ATP ratio 1.87) and an AF patient (PCr/ATP ratio 1.49) are shown in (B). PCr/ATP = ratio of phosphocreatine to ATP. One-way ANOVA with post-hoc Bonferroni correction; * indicates p < 0.05, ** indicates p < 0.01; error bars indicate SEM.