Fig-10; Left image: RV, RA, his catheter.Right image: After insertion of left subclavian access and injection in CS, dilated CS (black arrow). Irrigated catheter (yellow arrow)
Ablation was done in mid part of CS in broad area (because of earliest retrograde atrial activation in CS 1,2) with Radiofrequency (RF) energy, for 100 seconds at a temperature of 40-45˚C and power of 40 watts. after the delivery of the RF energy, there was persistent ventricular-atrial (VA) dissociation. HV interval after ablation was 55 msec.
ECG after ablation showed no Delta wave (Fig-11).