Isolated Left Bundle Branch Block in a Toddler

Abstract EN

Left bundle branch block (LBBB) usually occurs as a postoperative complication from surgical correction of congenital heart disease and can be associated with hypertensive heart disease, coronary artery disease, myocarditis, and aortic valvular disease.

Although isolated LBBB is a conduction abnormality found in some healthy adults, it has not been reported in pediatric population.

We report a 2-year-old, healthy African American female who was incidentally discovered to have isolated LBBB that has persisted in a follow-up of 3 years.