Remote Magnetic Versus Manual Navigation-guided Ablation for Non-outflow Tract Premature Ventricular Contractions: a Prospective, Randomized, Controlled Trial

Inclusion Criteria: 1. non-outflow tract PVCs 2. Holter\>10,000/24h or PVCs load\>10% 3. the first ablation procedure 4. failure of at least one AAD to treat PVCs before ablation Exclusion Criteria: 1. PVC ablation history 2. HF with NYHA IV 3. 3 months prior to AMI or PCI 4. Cardiac thrombosi 5. Hyperthyroidism 6. Pregnancy