Comparative study of electrocardiograms of healthy premature and full-term infants of similar weight

Walsh, S. Zoe

doi:10.1016/0002-8703(64)90039-0

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…Normal heart rate in premature infants can range anywhere from 100-200 beats per minute (Walsh, 1964). Heart rate averages vary depending on weight (Williams, Sanderson, Lai, Selwyn, & Lasky, 2009) and with gestation (Gagnon, Campbell, Hunse, & Patrick, 1987).…”

Section: Body Temperature and Heart Ratementioning

confidence: 99%

“…To help determine optimal body temperature, we examined heart rate in relationship to body temperature. Because normal heart rate specified in textbooks for neonates is quoted with a wide range, 100-200 beats per minute, (Walsh, 1964) and because each infant is so different, we defined normal heart rate for each infant as the 25 th to 75 th percentile for that infant from all the heart rate observations over the 12-hours of the study period. We defined abnormal heart rate as those observations below the 25 th percentile or above the 75 th percentile.…”

Section: Body Temperature and Heart Ratementioning

confidence: 99%

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Optimal Body Temperature in Transitional Extremely Low Birth Weight Infants Using Heart Rate and Temperature as Indicators

Knobel

Holditch‐Davis

Schwartz

2010

Journal of Obstetric, Gynecologic & Neonatal Nursing

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Extremely low birth weight (ELBW) infants are vulnerable to cold stress after birth. Therefore, caregivers need to control body temperature optimally to minimize energy expenditure. Objective We explored body temperature in relationship to heart rate in ELBW infants during their first 12 hours to help identify the ideal set point for incubator control of body temperature. Design Within subject, multiple-case design. Setting A tertiary NICU in North Carolina. Participants 10 infants, born less than 29 weeks gestation and weighing 400-1000 grams. Methods Heart rate and abdominal body temperature were measured at 1-minute intervals for 12 hours. Heart rates were considered normal if they were between the 25th and 75th percentile for each infant. Results Abdominal temperatures were low throughout the 12-hour study period (mean 35.17° C-36.68° C). Seven of ten infants had significant correlations between abdominal temperature and heart rate. Heart rates above the 75th percentile were associated with low and high abdominal temperatures; heart rates less than the 25th percentile were associated with very low abdominal temperatures. The extent to which abdominal temperature was abnormally low was related the extent to which the heart rate trended away from normal in six of the ten infants. Optimal temperature control point that maximized normal heart rate observations for each infant was between 36.8° C and 37° C. Conclusions Hypothermia was associated with abnormal heart rates in transitional ELBW infants. We suggest nurses set incubator servo between 36.8° C and 36.9° C to optimally control body temperature for ELBW infants.

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Section: Body Temperature and Heart Ratementioning

confidence: 99%

Section: Body Temperature and Heart Ratementioning

confidence: 99%

Optimal Body Temperature in Transitional Extremely Low Birth Weight Infants Using Heart Rate and Temperature as Indicators

Knobel

Holditch‐Davis

Schwartz

2010

Journal of Obstetric, Gynecologic & Neonatal Nursing

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“…Makarov et al [ 16 ] also observed decreasing QT intervals during the first four days. Comparing the values based on gestational age (GA), Walsh et al [ 17 ] showed that the group of 37 neonates born preterm, had significantly shorter QT intervals compared to 68 term cases. In the most recent study of Paerregaard et al [ 18 ], newborns [grouped by preterm (GA < 37 weeks) or term newborns (GA ≥ 37 weeks)], there was no significant difference in mean QT values (274 versus 274 ms, p = 0.670), respectively.…”

Section: Resultsmentioning

confidence: 99%

QTc Interval Reference Values and Their (Non)-Maturational Factors in Neonates and Infants: A Systematic Review

et al. 2022

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QTc interval measurement is a widely used screening tool to assess the risk of cardiac diseases, arrhythmias, and is a useful biomarker for pharmacovigilance. However, the interpretation of QTc is difficult in neonates due to hemodynamic maturational changes and uncertainties on reference values. To describe trends in QTc values throughout infancy (1 year of life), and to explore the impact of (non)-maturational changes and medicines exposure, a structured systematic review (PROSPERO CRD42022302296) was performed. In term neonates, a decrease was observed over the first week of life, whereafter values increased until two months of age, followed by a progressive decrease until six months. A similar pattern with longer QTc values was observed in preterms. QTc is influenced by cord clamping, hemodynamic changes, therapeutic hypothermia, illnesses and sleep, not by sex. Cisapride, domperidone and doxapram result in QTc prolongation in neonates. Further research in this age category is needed to improve primary screening practices and QTcthresholds, earlier detection of risk factors and precision pharmacovigilance.

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“…Makarov et al also observed decreasing QT intervals during the first four days [16]. Comparing the values based on gestational age (GA), Walsh et al showed that the group of 37 neonates born preterm, had significantly shorter QT intervals compared to 68 term cases [17]. In the most recent study of Paerregaard et al, newborns [grouped by preterm (GA <37 weeks) or term newborns (GA ≥37 weeks)], there was no significant difference in mean QT values (274 versus 274 ms, p=0.670) respectively.…”

Section: Early Neonatal Lifementioning

confidence: 98%

Qtc Interval Reference Values and Their (Non)-Maturational Factors in Neonates and Infants: A Systematic Review

Smet¹,

Devolder²,

Salaets³

et al. 2022

Preprint

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QTc interval measurement is a widely used screening tool to assess the risk of cardiac diseases, arrhythmias, and is a useful biomarker for pharmacovigilance. However, interpretation of QTc is difficult in neonates due to hemodynamic maturational changes and uncertainties on reference values. To describe trends in QTc values throughout infancy (1 year of life), and to explore the impact of (non)-maturational changes and medicines exposure, a structured systematic review (PROSPERO CRD42022302296) was performed. In term neonates, a decrease was observed over the first week of life, whereafter values increased until two months of age, followed by a progressive decrease until six months. A similar pattern, with longer QTc values was observed in preterms. QTc is influenced by cord clamping, hemodynamic changes, therapeutic hypothermia, illnesses and sleep, not by sex. Cisapride, domperidone and doxapram result in QTc prolongation in neo-nates. Further research in this age category is needed to improve primary screening practices, earlier detection of risk factors and precision pharmacovigilance.

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Comparative study of electrocardiograms of healthy premature and full-term infants of similar weight

Cited by 9 publications

References 9 publications

Optimal Body Temperature in Transitional Extremely Low Birth Weight Infants Using Heart Rate and Temperature as Indicators

Optimal Body Temperature in Transitional Extremely Low Birth Weight Infants Using Heart Rate and Temperature as Indicators

QTc Interval Reference Values and Their (Non)-Maturational Factors in Neonates and Infants: A Systematic Review

Qtc Interval Reference Values and Their (Non)-Maturational Factors in Neonates and Infants: A Systematic Review

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