How often do cardiac ablation surgeries result in complications requiring pacemakers implantation?

It depends. It depends on the ablation type: almost never for wpw, atrial fibrillation/flutter or ventricular tachycardia; 1% or less for avnrt (atrioventricular nodal reentry tachycardia). In avnrt, there is an extra 'lane' in the av node that conducts electrical impulses leading to tachycardia and the ablation can unintentionally damage the whole av node resulting in heart block and need for pacemaker.
Nodal ablation. In ablating cardiac dysrhythmias, the ablation catheters can sometimes affect the conduction to or from the atrio-venticular node (avn). This is an important regulator of heart rate and if affected the reslutant 'escape rhythm' may be too slow to accomadte normal activity; thus a pacemaker is required. In some conditions, like atrial fibrillation, the goal may be avn ablation and pacemaker implant.
It depends. There are certain procedures in very specific patients where that risk is high, but generally the risk is much less than 1%.

Related Questions

Had a cardiac ablation two weeks ago and now my heart ratee is going from 50 to as high as 130 Could that mean a pacemaker Getting an even monitor?

Great question! Since you've already had an ablation, you already have an expert at your disposal to help answer this question - the same doctor who did your procedure. He or she needs to know your symptoms in order to obtain any additional testing, which may well be an event monitor. Call today! Read more...