The safety and efficacy of catheter ablation for treatment of most types of
cardiac arrhythmias are well established. These arrhythmias and arrhythmia
substrates include AVNRT, accessory pathways, focal atrial tachycardia, at
rial flutter, idiopathic ventricular tachycardia, and bundle-branch re-entr
y. Catheter ablation is considered as an alternative to pharmacologic thera
py in the treatment of these cardiac arrhythmias.