Sequential ablation of orthodromic atrioventricular tachycardia and ectopic atrial tachycardia with a single application of radiofrequency energy.

A 62-year-old woman with Wolff-Parkinson-White syndrome had two types of tachycardia; ectopic AT and orthodromic-type AVRT. A radiofrequency application 2 cm inside the coronary sinus ostium eliminated ectopic AT and accessory pathway conduction at once.