PEDIATRICS Vol. 39 No. 3 March 1967, pp. 446-448
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Elongated Patent Ductus Arteriosus with Intermittent Shunting

COLETTE M. KOHLER M.D., F.A.A.P.1 and DAN G. MCNAMARA M.D., F.A.A.P.2

1 Department of Pediatrics, Children's Hospital, 745 W. Houston Street, San Antonio, Texas 78207
2 Department of Pediatrics, Baylor University College of Medicine, Houston, Texas 77025

The presence of patent ductus arteriosus without a typical continuous murmur has long been recognized, especially in the presence of pulmonary hypertension, or a small ductus, or with associated cardiac defects; however, there are only a few reports of documented, intermittently disappearing murmurs occurring in individuals over 6 months of age with a substantial shunt in the absence of pulmonary hypertension or associated defects. Danilowicz, et al. have recently reported delayed closure of the ductus anteriosus up to 6 months of age in some premature infants.

We present this case report of a 2frac12-year-old boy with patent ductus arteriosus with cardiac catheterizations during the disappearance and subsequent reappearance of a continuous murmur with documentation of absence of shunting when the murmur was absent and substantial shunting if the murmur was present.