Patients with cardiac arrhythmias will be undergoing RF ablation using the Niobe Remote Magnetic Navigation System with CDS as their standard of care. System performance data will only be collected during the RF ablation procedure. Outcome measures will be evaluated with the CDS connected and without the CDS connected within all patients.

For all subjects included in the study, the ablation procedure will be started per standard of care. First mapping, pacing and electrocardiograms of the right atrium will be evaluated without the CDS box connected. Second the CDS box will be connected to the catheter and mapping, pacing and electrocardiograms will be recorded again. Next, ablation will be conducted per standard of care.

Physician's and technician's subjective score of the quality of mapping the right atrium without CDS box connected and with CDS box connected

Pacing thresholds of three separate areas of the right atrium without CDS box connected and pacing thresholds of the same three areas with CDS box connected

Pacing capture of three separate areas of the right atrium without CDS box connected and pacing capture of the same three areas with CDS box connected

Difference between and disturbance of the intracardiac electrocardiograms without the CDS box connected versus with the CDS box connected, evaluated by two independent and blinded electrophysiologists

Major adverse events: death, acute myocardial infarction (AMI) or coronary artery damage, major bleeding - type III and V, abdominal bleeding, tamponade > 80cm3, late tamponade, ischemic cerebral event