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Antenatal Calcium Channel Blocker Exposure and Subsequent Patent Ductus Arteriosus in Extremely Low-Birth-Weight Infants

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Abstract

This study aimed to assess whether tocolytic fetal exposure to antenatal calcium channel blockers (aCCB) increases the risk for hemodynamically significant patent ductus arterioses (hsPDA) in extremely low-birth-weight (ELBW) infants. This case-control study investigated ELBW infants (<1,000 g) without cardiac defects in a level 3 neonatal intensive care unit who had survived at least 7 days. Nifedipine was the only aCCB used for this study population. The measurements included the history of aCCB exposure, selected maternal data, hsPDA diagnosis, gestational age at birth, birth weight, mode of delivery, sex, maternal race, location of birth, Apgar scores, and selected neonatal morbidities. The end point of the study was hsPDA, defined as an echocardiographically confirmed PDA with clinical symptoms. A total of 180 infants met the study criteria. The diagnosis was hsPDA for 56% of these patients, 20% of whom had aCCB exposure. Of the infants without hsPDA, 11% had aCCB exposure (p = 0.09). No statistically significant associations were found between aCCB exposure and hsPDA after adjustment for gestational age (odds ratio [OR], 1.5; 95% confidence interval [CI], 0.6–3.7) or for gestational age and cumulative aCCB exposure of 100 mg or more (OR, 2.0; 95% CI, 0.6–6.5). A history of aCCB exposure does not appear to increase hsPDA risk in ELBW infants. Studies using neonatal serum nifedipine concentrations after antenatal exposure should be performed to confirm this conclusion.

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Authors and Affiliations

  1. Department of Pediatrics, Goryeb Children’s Hospital, Atlantic Health System, Morristown, NJ, 07960, USA

    Jennifer McGuirl, Bonnie Arzuaga & Ben H. Lee

  2. Morristown Medical Center, 100 Madison Avenue, Morristown, NJ, 07960, USA

    Jennifer McGuirl, Bonnie Arzuaga & Ben H. Lee

  3. MidAtlantic Neonatal Research Institute, MidAtlantic Neonatology Associates, Morristown, NJ, 07960, USA

    Ben H. Lee

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  1. Jennifer McGuirl
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  2. Bonnie Arzuaga
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Correspondence to Ben H. Lee.

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McGuirl, J., Arzuaga, B. & Lee, B.H. Antenatal Calcium Channel Blocker Exposure and Subsequent Patent Ductus Arteriosus in Extremely Low-Birth-Weight Infants. Pediatr Cardiol 33, 60–64 (2012). https://doi.org/10.1007/s00246-011-0082-x

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  • DOI: https://doi.org/10.1007/s00246-011-0082-x

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