TETRALOGIA DE FALLOT-ECG

Tetralogy of Fallot S S Prabhu, Sumitra Venkatesh Division of Pediatric Cardiology, B J Wadia Hospital for Children, Mumbai Address for Correspondence: S S Prabhu, Division of Pediatric Cardiology, B J Wadia Hospital for Children, Mumbai. Email: ssprabhu1@hotmail.com A 12 week old baby with cyanosis on crying and having grade II, VI ejection murmur in 2nd left intercostal space. Interpret ECG

1} Heart rate of 150 , min {2} Rhythm – Sinus {3} QRS axis plus100,{4} PR interval -0.12 sec, QRS duration 0.09 sec, QTC- 0.4 sec. P and T axis are normal and QRS axis is 110°. Criteria of RVH –RV1 13mm, T wave in V 1, V2 at 12 weeks suggest {normally –ve by 5 days of life} systolic overload . ECH suggestive of RV systolic overload – valvar or infundibular stenosis , pulmonary branch stenosis. As the given case was a 12 week old child with intermittent cyanosis on crying with above ECG could suggest Tetralogy of Fallot {TOF} physiology . E-published: June 2007, Vol 4 Issue 6 Art # 24