Abstract

Bradycardia during early childhood was mentioned first in 1896, by Schuster,<sup>1</sup>who reported a case of rheumatic fever in a child 4 years old who had transient bradycardia, with a rate of 35, the mechanism of which was unknown. It was not until 1908 that graphic proof of congenital auriculoventricular heart block was obtained.<sup>2</sup>In 1929, Yater<sup>3</sup>presented an exhaustive survey of the literature and tabulated the results in thirty cases, including one of his own. The auriculoventricular block was complete in twenty-two of these cases, the remainder showing varying degrees of partial block. Since Yater's publication, additional instances of congenital auriculoventricular heart block have been reported by Nicolson, Shulman and Green,<sup>4</sup>Leech,<sup>5</sup>Koenen<sup>6</sup>and Lampard.<sup>7</sup> Two additional cases are presented, one of which is unique in view of the fact that the bradycardia was noted two months before birth, and was proved

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