Hypocalcemia is a relatively uncommon but reversible cause of left ven
tricular dysfunction in infants and children. A 30-day-old boy with id
iopathic hypocalcemia presented with congestive heart failure and conv
ulsive seizures. He had no evidence of underlying cardiac disease. The
cardiac failure responded to calcium therapy. It is suggested that hy
pocalcemia should be considered as a possible cause of left ventricula
r dysfunction in infants.