1 Nursery Service, Jefferson Davis Hospital, and the Departments of Pediatrics, Physiology, and Rehabilitation, Baylor University College of Medicine, Houston, Texas
Patterns of instantaneous heart rate were studied in 74 premature infants with idiopathic respiratory distress syndrome. Half (50.3%) of the recordings showed this finding during the course of the disease. It was found most frequently during the first 24 hours after birth. This finding is reversed in recovering infants.
Based on present data, persisting fixation of the heart rate in an infant with idiopathic respiratory distress appears to be indicative of a poor prognosis, whereas the presence or return of fluctuations in the recording of such an infant may permit a more favorable outlook.
Submitted on July 17, 1964
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