The occurrence of paroxysmal tachycardia in infancy and in childhood is extremely rare, and few authentic cases have been recorded in medical literature. The youngest patient in a reported case was an infant, aged 4 days, whose case was reported by Werley.1 The type of tachycardia was not identified because electrocardiograms were not taken, but polygraphic tracings showed the rate of the heart to be 307 a minute. Necropsy revealed a widely patent foramen ovale; distinctive microscopic changes were not evident.
Colgate and McCulloch2 reported two cases of paroxysmal tachycardia in infancy; one occurred in a child, aged 21 days, and the other in a child, aged 24 days. In the first case the rate of the heart was 250 during a paroxysm, but since electrocardiograms were not obtained, the type of tachycardia was not determined. In the second case, electrocardiograms revealed changes that the authors concluded were
WILLIUS FA, AMBERG S. PAROXYSMAL TACHYCARDIA WITH SYNCOPE OCCURRING IN A CHILD. Am J Dis Child. 1929;38(3):551–558. doi:10.1001/archpedi.1929.01930090103013
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