Paroxysmal tachycardia is of rare occurrence in childhood, and especially so in early infancy. Willius and Amberg1 recently collected and summarized the twenty-three cases previously reported, adding another case of their own of paroxysmal tachycardia with syncope in a child of 7 years. Only eight of these twenty-four cases occurred in infants less than 1 year of age.
The case here reported is one of paroxysmal tachycardia with syncope in an apparently healthy infant of 7 months, with no other evidence of cardiac disturbance.
REPORT OF CASE
M. M., a white girl, born after a full-term pregnancy terminated by a difficult labor with high forceps delivery, was apparently entirely normal at birth and weighed 8 pounds (3.6 Kg.). On discharge from the hospital at the age of 2 weeks she was in good condition and was on breast feedings supplemented by a cow's milk formula.She was first seen