BACKGROUND: A short baseline @entity955 ( @entity955 ) cycle length (CL) has been associated with a worse outcome after catheter ablation for @entity955 , whereas the impact of a long baseline AFCL is unknown. We investigated the influence of AFCL on acute and long-term success in a large series of @entity1 undergoing catheter ablation for persistent @entity955 . METHODS: Overall, 177 consecutive @entity1 undergoing catheter ablation of persistent @entity955 using a sequential ablation approach were included in the analysis. AFCL was measured in the left atrial appendage (LAA) at baseline and following each ablation step. The primary endpoint was freedom from any @entity943 off antiarrhythmic drugs (AAD) with a single ablation procedure after 12  months. RESULTS: Mean AFCL was 164        24  ms. A shorter AFCL was associated with longer @entity955 duration, larger LA diameter, and longer procedure duration. Termination to sinus rhythm (SR) was achieved in 57 (32  %) @entity1 . Baseline AFCL was shorter (161        24  ms) in @entity1 without @entity955 termination compared to @entity1 with @entity955 termination (169        23  m, p   =   0.03). The primary endpoint was reached less frequently in @entity1 with a short (<155  ms) AFCL (18 vs. 38.5  %, p   =   0.006). @entity1 with an AFCL between 155 and 200  ms had the best outcome compared to @entity1 with AFCL <155 or >= 200  ms (40 vs. 18  %, p   =   0.003). CONCLUSIONS: @entity1 with a baseline AFCL between 155 and 200  ms have the best outcome after a single ablation procedure for persistent @entity955 compared to @entity1 with an AFCL of <155 or >= 200  ms.

Impact of baseline @entity955 cycle length on acute and long-term outcome of persistent XXXX ablation.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity943 :: ('MESH:D001145', 'Disease') :: ['atrial arrhythmia'] @entity955 :: ('MESH:D001281', 'Disease') :: ['atrial fibrillation', 'AF']
@entity955 :: (MESH:D001281,Disease) :: ['atrial fibrillation']
