Increased risk of bradycardia in vigorous infants receiving early as compared to delayed cord clamping at birth
Journal of Perinatology(2022)
摘要
Objective To compare HR pattern of vigorous newborns during the first 180 s with early (≤60 s, ECC) or delayed (>60 s, DCC) cord clamping. Study design Observational study including dry-electrode ECG monitoring of 610 vaginally-born singleton term and late-preterm (≥34 weeks) who were vigorous after birth. Results 198 received ECC while 412 received DCC with median cord clamping at 37 s and 94 s. Median HR remained stable from 30 to 180 s with DCC (172 and 170 bpm respectively) but increased with ECC (169 and 184 bpm). The proportion with bradycardia was higher among ECC than DCC at 30 s and fell faster in the DCC through 60 s. After adjusting for factors affecting timing of cord clamping, ECC had significant risk of bradycardia compared to DCC (aRR 1.51; 95% CI; 1.01–2.26). Conclusion Early heart instability and higher risk of bradycardia with ECC as compared to DCC supports the recommended clinical practice of DCC.
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关键词
Circulation,Epidemiology,Medicine/Public Health,general,Pediatrics,Pediatric Surgery
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