Hello and thanks for the query
The first line of treatment of SVT
is through medication like beta-blockers or calcium channel blockers or both. If this line of treatment fails to control the attacks or there is adverse effects of medication than we have to go for ablation procedure. 99% of the procedure are uncomplicated and patient usually recovers well. 1% chances are that patient may go in bradycardia
and need to keep on Temporary Pacemaker for a period of time. This procedure is a small procedure and does not require any stiching.
So do worry and go for the procedure as advised by your doctor.