Superior vena cava-right atrium (SVC-RA) activation map during sinus rhythm show the reconduction of the SVC.The circumferential conduction block line was detected by lower threshold function at 20% with total local activation time of 155 ms (white line). The propagation broke through the gap at phrenic nerve (PN) site from the RA to the SVC. The PN sites were identified by high and low-output pacing (white points and orange points). We performed the longitudinal linear ablation from the RA to the SVC in a cranial direction (red points).