%A Berardo Sarubbi %A Pasquale Vergara %A Michele D?Alto %A Francesco Sessa %A Raffaele Calabr? %J Indian Pacing and Electrophysiology Journal %T Intra-atrial Re-entrant Tachycardia with Wenckebach Periodicity %X A 15-year-old girl, previously asymptomatic for palpitations, underwent a successful atrial septal defect (ASD) device closure. Twelve weeks after the procedure, the patient was admitted complaining of dyspnoea on effort and palpitations. The twelve-lead ECG showed a narrow QRS tachycardia with slight heart rate irregularity, with a mean HR of 170bpm. P waves were not clearly identified with a suspicious of negative P-waves in II, III and aVF leads. No clear relationship could be observed between the suspected P waves and QRS complexes %N 4 %K Intra-atrial Re-entrant Tachycardia; Wenckebach Periodicity %P 270-272 %E Balbir Singh %E Yash Lokhandwala %E Johnson Francis %E Anup Gupta %V 3 %D 2003 %I Indian Pacing and Electrophysiology Group %L cogprints4254