January 1973

Congenital Intraventricular Trifascicular Block

Author Affiliations

Brooklyn, NY
From the departments of pediatrics (Drs. Chan and Liu) and surgery (Dr. Potter), Brooklyn-Cumberland Medical Center, Brooklyn, NY.

Am J Dis Child. 1973;125(1):82-87. doi:10.1001/archpedi.1973.04160010052012

A unique and complex pattern of intraventricular trifascicular block was documented electrocardiographically, for the first time, in a newborn infant with a history of transient intrauterine bradycardia. The clinical course was progressive, leading to a high-degree atrioventricular block, accompanied by severe Adams-Stokes attacks and congestive heart failure. Pacemaker therapy had to be instituted at the age of 3 months. Congenital intraventricular trifascicular block differs from the usual form of congenital heart block. It deserves close observation and early therapeutic intervention.