Contact Index for PulseSelect Catheter Apposition: Validation by Transesophageal Echocardiography.
BACKGROUND Reliable catheter-tissue apposition is important for effective pulmonary vein isolation using pulsed field ablation. The contact index, derived from real-time impedance rise on the EnSite X mapping system, may provide an objective surrogate for catheter contact; however, its utility with the PulseSelect cath...