ECG Answer for ~ May 16th 2012

Sinus rhythm. Heart Rate 110/min. QRS axis -50
PR: 180ms QRS: 90ms QT/QTc: 346/463 ms
RA enlargement.
Left axis deviation / Left anterior fascicular block.
RV conduction delay. RVH
Imp: RAE. Left axis deviation. RVH

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Comment: LAD/LAFB is classical for an AV Septal Defect. RV conduction delay with R' >10mm at this age = RVH. RA enlargement with 1st degree AV block are also common with AVSD. This boy has an ASD primum with a significant left to right shunt.