Reentrant atrial tachycardia originating from the sinus venosa region

A 78-year old woman with palpitation exhibited an atrial tachycardia (AT) of variable cycle lengths resembling atrial fibrillation (AF). Vague centrifugal activation was noted at the sinus venosa region where overdrive pacing demonstrated entrainment with concealed fusion and the stimulus to P wave approximated the electrogram to the P wave interval of 125ms. Application of radiofrequency energy to this site resulted in termination of the AT as well as formation of a fixed block line manifested by the presence of discrete double potentials.

Source: Journal of Electrocardiology - March 5, 2018 Category: Cardiology Authors: Ryo Sasaki, Hisashi Yokoshiki, Yuki Chiba, Motoki Maeno, Hirofumi Mitsuyama, Masaya Watanabe, Taro Tenma, Rui Kamada, Masayuki Takahashi, Minoru Ota Source Type: research