SUCCESSFUL RADIOFREQUENCY CATHETER ABLATI ON OF AN ACCESSORY PATHWAY LOCATED IN THE NECK OF A CORONARY SINUS ANEURYSM

In this case report the electrophysiological findings in a 24 year old female patient are demonstrated. For about 12 years she suffered from recurrent atrioventricular reentrant tachycardia with a rate of 230 b eats per minute. Electrophysiological study resulted in diagnosis of a posteroseptal accessory pathway. Ablation was attempted primarily fro m a left ventricular access, but the pathway could not be reached from this position. After contrasting the coronary sinus a large coronary sinus aneurysm could be diagnosed. The accessory pathway was located i n the ''neck'' region of the aneurysm. By application of radiofrequenc y current in this location the bypass tract could be ablated. This cas e report shows that accessory pathways in coronary sinus aneurysms can be ablated without complications in this location.