Abstract

Eighteen term newborn infants who had been evaluated by internal fetal heart rate (FHR) monitoring were studied to correlate fetal monitor tracings with Apgar scores and serum creatine phosphokinase-2 (CPK2), the myocardium-specific isoenzyme of CPK. The percentage of CPK2 at 30 ± 6 hours did not correlate significantly with Apgar scores. However, values for the percentage of CPK2 at 30 ± 6 hours were significantly higher in neonates with abnormal FHR tracings than in those with normal FHR tracings (p < 0.01). These preliminary data suggest that subtle intrapartum asphyxial injury may be present without adversely affecting Apgar scores.

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