Abstract
A newborn presents with redness of both cheeks. ### Prenatal History: 33-year-old G4P2 white woman had a prenatal course that was complicated by fetal tachycardia at 35 weeks estimated gestational age, which resolved without intervention, and anemia requiring blood transfusion 1 week before delivery. Prenatal laboratory evaluation revealed unremarkable findings; group B Streptococcus status was unknown. ### Birth History: At 18 hours of age, the infant’s heart rate is more than 190 beats/min. Electrocardiography shows supraventricular tachycardia. The vagal maneuver with ice bag elicits no response. She responds to one dose of intravenous adenosine, with subsequent resolution of the tachycardia. She is transferred to a level 3 neonatal intensive care unit for further cardiac evaluation. ### Physical Examination:
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