BACKGROUND: Catheter @entity5526 ( @entity5526 ) has a strong correlation with lesion formation during radiofrequency ablation. Delayed-enhancement cardiac magnetic resonance (DE-CMR) provides lesion information in @entity1 with prior @entity955 ( @entity955 ) ablation. OBJECTIVE: The aim of this study was to determine the @entity5526 threshold to create permanent lesions detected by DE-CMR. METHODS: A total of 36 @entity1 referred for @entity955 ablation were included. A @entity5526 catheter was used during the ablation procedure, and DE-CMR was performed 3 months after the ablation procedure. Eighteen pulmonary vein (PV) segments were defined, and 3-dimensional (3D) reconstructions of the left atrium (LA) derived from the DE-CMR images were obtained. One observer evaluated the presence of any discontinuity of previous ablation lesions (gap) in the 3D reconstructions of the LA, and another observer (blinded to the gap findings) determined the minimum @entity5526 value in each PV segment. RESULTS: The PV segments where a gap was observed had a lower maximal @entity5526 value than did the segments without gap in the 3D LA reconstructions (6.7    4.4 g vs 12.2    4.7 g; P < .001). In receiver operating characteristic analysis, a @entity5526 threshold of >8 g provided 73% sensitivity and 81% specificity in the prediction of a complete @entity358 (positive predictive value [ @entity2286 ] 84%). A @entity5526 threshold of >12 g had a specificity of 94% and increased the @entity2286 to 91% in creating a complete lesion in the LA wall (area under the curve 0.834). CONCLUSION: A @entity5526 threshold of >12 g H5H20 predicts a complete lesion with high specificity and @entity2286 when a dragging ablation strategy is used in @entity955 ablation.

Contact force threshold for permanent lesion formation in XXXX : A cardiac magnetic resonance-based study to detect ablation gaps.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity2286 :: ('12211', 'Species') :: ['PPV'] @entity5526 :: ('MESH:D003877', 'Disease') :: ['contact force', 'CF'] @entity358 :: ('MESH:D008171', 'Disease') :: ['PV lesion'] @entity955 :: ('MESH:D001281', 'Disease') :: ['atrial fibrillation', 'AF']
@entity955 :: (MESH:D001281,Disease) :: ['atrial fibrillation ablation']
