Corrie J Alonzo1, Vijay P Nagraj2, Jenna V Zschaebitz3, Douglas E Lake4, J Randall Moorman4, Michael C Spaeder3,4. 1. Department of Pediatrics, University of Virginia, Charlottesville, VA, USA. cjs5te@virginia.edu. 2. University of Virginia School of Medicine, Charlottesville, VA, USA. 3. Department of Pediatrics, University of Virginia, Charlottesville, VA, USA. 4. Center for Advanced Medical Analytics, University of Virginia School of Medicine, Charlottesville, VA, USA.
Abstract
OBJECTIVE: There are limited evidence-based published heart rate ranges for premature neonates. We determined heart rate ranges in premature neonates based on gestational and post-menstrual age. STUDY DESIGN: Retrospective observational study of premature neonates admitted to the neonatal intensive care unit at the University of Virginia between January 2009 and October 2015. We included gestational ages between 23 0/7 weeks and 34 6/7 weeks. We stratified data by gestational and post-menstrual age groups. RESULTS: Over two billion heart rate values in 1703 neonates were included in our study. We established percentile-based reference ranges based on gestational and post-menstrual age. Our results demonstrate a slight increase in the initial weeks after birth, followed by a gradual decline with age. The baseline heart rate is lower with advancing gestational age. CONCLUSIONS: Knowing heart rate reference ranges in the premature neonatal population can be helpful in the bedside assessment of the neonate.
OBJECTIVE: There are limited evidence-based published heart rate ranges for premature neonates. We determined heart rate ranges in premature neonates based on gestational and post-menstrual age. STUDY DESIGN: Retrospective observational study of premature neonates admitted to the neonatal intensive care unit at the University of Virginia between January 2009 and October 2015. We included gestational ages between 23 0/7 weeks and 34 6/7 weeks. We stratified data by gestational and post-menstrual age groups. RESULTS: Over two billion heart rate values in 1703 neonates were included in our study. We established percentile-based reference ranges based on gestational and post-menstrual age. Our results demonstrate a slight increase in the initial weeks after birth, followed by a gradual decline with age. The baseline heart rate is lower with advancing gestational age. CONCLUSIONS: Knowing heart rate reference ranges in the premature neonatal population can be helpful in the bedside assessment of the neonate.
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