Study period: 1991-4. Boston Children's Hospital. n=2698 surgeries (73% on bypass).
Overall incidence of AV block was 3% (n=54).
Common diagnoses associated with development of AV block were VSD, Tetralogy, LVOTO repair, L-TGA and others.
32 recovered conduction in 30 days after surgery (Graph below shows the postop. day at which conduction recovered in these 32 patients).
9 did not recover conduction in 30 days after surgery.
Weindling SN., et al. Duration of complete atrioventricular block after congenital heart surgery. Am J Cardiol 1998;82:525-527.
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