Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 38 4 2000 12 15 232 237 Moghaddam M Yamini Sharif A 2015 09 28 Transcatheter ablation of atrioventricular accessory pathway is the therapy of choice in symptomatic patients. The ablation of posteroseptal accessory pathways thas some important points due to its anatomical location. Catheter ablation of posteroseptal accessory pathways via left side approach is time consuming with low success rate and higher complications. We performed successful transcatheter radio frequency ablation of posteroseptal accessory pathways in 25 patients. This was done via right atrial approach in 23 cases and left side approach in 2 cases. https://acta.tums.ac.ir/index.php/acta/article/view/2322 https://acta.tums.ac.ir/index.php/acta/article/download/2322/2312