Real-world Experience of Catheter Ablation for the Treatment of Arrhythmias

REAL AF Cohort Inclusion Criteria: * Symptomatic PAF (AF episode terminate spontaneously within 7 days) or PsAF (AF sustained beyond 7 days, but less than 365 days) subjects who, in the opinion of the investigator, are candidates for catheter ablation. * \>18 years of age. * Will be treated with Biosense Webster Inc. ablation technologies * All AF ablations performed with BWI catheters are included. This includes repeat ablations where the index procedure was performed with a non-BWI catheter. * Able and willing to participate in baseline and follow up evaluations * Willing and able to provide informed consent, if applicable. Exclusion Criteria: * Enrolled in an investigational drug or device clinical trial, or any trial that dictates the treatment plan * Long-standing persistent AF (AF greater than one year) * In the opinion of the investigator, any known contraindication to an ablation procedure CORE VA Cohort Inclusion Criteria: * Documented ventricular arrhythmia appropriate for catheter ablation. * \>18 years of age. * Will be treated with Biosense Webster Inc. ablation technologies * Able and willing to participate in baseline and follow up evaluations * Willing and able to provide informed consent, if applicable. Exclusion Criteria: * Enrolled in an investigational drug or device clinical trial, or any trial that dictates the treatment plan. * In the opinion of the investigator, any known contraindication to an ablation procedure.