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Comparison of the effects of antenatal magnesium sulphate and ritodrine exposure on circulatory adaptation in preterm infants
Author(s) -
Rantonen T.H.,
Grönlund J.U.,
Jalonen J.O.,
Ekblad U.U.,
Kääpä P.O.,
Kero P.O.,
Välimäki I. A.T.
Publication year - 2002
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1046/j.1475-097x.2002.00387.x
Subject(s) - ritodrine , medicine , respiratory distress , blood pressure , heart rate , gestation , gestational age , anesthesia , circulatory system , diastole , pregnancy , genetics , biology
We examined the effects of maternal magnesium sulphate (MgSO 4 ) and ritodrine treatments on the autonomic cardiovascular control in preterm neonates with respiratory distress syndrome during the first 2 days of life. Serial measurements of heart rate (HR), blood pressure (BP) and respirogram were performed during the first 2 days of life in 28 preterm infants below 33 weeks of gestation with antenatal exposure to MgSO 4 ( n =13) or ritodrine ( n =15), and in 12 non‐exposed preterm controls. Spectral analysis was used for the quantification of HR and BP variability. Although antenatal MgSO 4 exposure had no effect on HR or the systolic, diastolic or mean BP, it was associated with significant decreased beat‐to‐beat changes in BP. In contrast, ritodrine exposure had no consistent effects on the autonomic cardiovascular control during the first 2 days of life. Our data suggest that maternal MgSO 4 treatment decreases the neonatal high frequency changes in BP. This early vascular stabilizing effect of antenatal MgSO 4 exposure may contribute to a lowered risk of cerebral vascular catastrophes, in the vulnerable areas of the brain, among the preterm infants with respiratory distress syndrome.