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Alarming Heart Rates

Alarming Heart Rates Abstract Pediatricians are concerned about appropriate monitoring of vital functions in infants both in the hospital and at home. Besides respiratory frequency and apnea duration, most electronic monitors evaluate instantaneous heart rate and activate an auditory and visual alarm at a preset value. The choice of the low heart-rate threshold might be based on either statistical probability or on clinical significance. In this issue of AJDC, Hodgman et al1 report observations of heart rates in 14 full-term and 19 preterm infants at several chronological ages. Having selected an operational definition of transient episode of bradycardia, they analyzed tracings collected over one night in the laboratory. The definition included episodes of fall in heart rate to an instantaneous value equal to or less than 90 beats per minute, or a fall of 30 beats per minute when associated with apnea or a decrease in transcutaneous Po2 of 15 mm Hg References 1. Hodgman JE, Hoppenbrouwers T, Cabal LA. Episodes of bradycardia during early infancy in the term-born and preterm infant . AJDC . 1993; 147:960-964. 2. Kelly DH, Stellwagen LM, Kaitz E, Shannon DC. Apnea and periodic breathing in full-term infants during the first twelve months . Pediatr Pulmonol . 1985;1:220-223.Crossref 3. Kelly DH, Pathak A, Meny R. Sudden severe bradycardia in infancy . Pediatr Pulmonol . 1991; 10:199-204.Crossref http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Diseases of Children American Medical Association

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Publisher
American Medical Association
Copyright
Copyright © 1993 American Medical Association. All Rights Reserved.
ISSN
0002-922X
DOI
10.1001/archpedi.1993.02160330029010
Publisher site
See Article on Publisher Site

Abstract

Abstract Pediatricians are concerned about appropriate monitoring of vital functions in infants both in the hospital and at home. Besides respiratory frequency and apnea duration, most electronic monitors evaluate instantaneous heart rate and activate an auditory and visual alarm at a preset value. The choice of the low heart-rate threshold might be based on either statistical probability or on clinical significance. In this issue of AJDC, Hodgman et al1 report observations of heart rates in 14 full-term and 19 preterm infants at several chronological ages. Having selected an operational definition of transient episode of bradycardia, they analyzed tracings collected over one night in the laboratory. The definition included episodes of fall in heart rate to an instantaneous value equal to or less than 90 beats per minute, or a fall of 30 beats per minute when associated with apnea or a decrease in transcutaneous Po2 of 15 mm Hg References 1. Hodgman JE, Hoppenbrouwers T, Cabal LA. Episodes of bradycardia during early infancy in the term-born and preterm infant . AJDC . 1993; 147:960-964. 2. Kelly DH, Stellwagen LM, Kaitz E, Shannon DC. Apnea and periodic breathing in full-term infants during the first twelve months . Pediatr Pulmonol . 1985;1:220-223.Crossref 3. Kelly DH, Pathak A, Meny R. Sudden severe bradycardia in infancy . Pediatr Pulmonol . 1991; 10:199-204.Crossref

Journal

American Journal of Diseases of ChildrenAmerican Medical Association

Published: Sep 1, 1993

References