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. 1980 Jan;43(1):14–20. doi: 10.1136/hrt.43.1.14

Study of cardiac rhythm in healthy newborn infants.

D P Southall, J Richards, P Mitchell, D J Brown, P G Johnston, E A Shinebourne
PMCID: PMC482236  PMID: 7356857

Abstract

Twenty-four-hour electrocardiograms were recorded in the first 10 days of life on 134 healthy full-term infants with birthweights greater than 2.5 kg. The highest heart rate a minute, measured over nine beats, was 175 +/- 19 (SD). The lowest rates, measured over three, five, and nine beats were 82 +/- 12, 87 +/- 12, and 93 +/- 12, respectively. At their lowest rates 109 infants had sinus bradycardia and 25 had junctional escape rhythms. Thirty-three infants showed changes in P wave configuration with or without pronounced variation in PR interval. Atrial premature beats were present in 19 infants but only one had more than 12 per hour. In a randomly selected subgroup of 71 infants sinus pauses were found in 51 (72%). Five (7%) had electrocardiographic patterns and rhythm disturbances that could not be differentiated from those previously described as complete sinuatrial exit block or sinus arrest, eight (11%) had patterns indistinguishable from 2:1 sinuatrial block, and 23 (32%) had pattern indistinguishable from sinuatrial Wenckebach block. This study shows that normal infants have variations in heart rate and rhythm hitherto considered to be abnormal.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. El-Said G. M., Gillette P. C., Cooley D. A., Mullins C. E., McNamara D. G. Protection of the sinus node in Mustard's operation. Circulation. 1976 May;53(5):788–791. doi: 10.1161/01.cir.53.5.788. [DOI] [PubMed] [Google Scholar]
  2. Greenwood R. D., Rosenthal A., Sloss L. J., LaCorte M., Nadas A. S. Sick sinus syndrome after surgery for congenital heart disease. Circulation. 1975 Aug;52(2):208–213. doi: 10.1161/01.cir.52.2.208. [DOI] [PubMed] [Google Scholar]
  3. LIPTON E. L., STEINSCHNEIDER A., RICHMOND J. B. AUTONOMIC FUNCTION IN THE NEONATE. VIII. CARDIO-PULMONARY OBSERVATIONS. Pediatrics. 1964 Feb;33:212–215. [PubMed] [Google Scholar]
  4. Onat A., Domaniç N., Onat T. Sick sinus syndrome in an infant: severe disturbance of impulse formation and conduction involving the S-A node and the A-V junctional tissue. Eur J Cardiol. 1974 Aug;2(1):79–83. [PubMed] [Google Scholar]
  5. Saalouke M. G., Rios J., Perry L. W., Shapiro S. R., Scott L. P. Electrophysiologic studies after mustard's operation for d-transposition of the great vessels. Am J Cardiol. 1978 May 22;41(6):1104–1109. doi: 10.1016/0002-9149(78)90864-0. [DOI] [PubMed] [Google Scholar]
  6. Schamroth L., Dove E. The Wenckebach phenomenon in sino-atrial block. Br Heart J. 1966 May;28(3):350–358. doi: 10.1136/hrt.28.3.350. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Scott O., Macartney F. J., Deverall P. B. Sick sinus syndrome in children. Arch Dis Child. 1976 Feb;51(2):100–105. doi: 10.1136/adc.51.2.100. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Southall D. P., Orrell M. J., Talbot J. F., Brinton R. J., Vulliamy D. G., Johnson A. M., Keeton B. R., Anderson R. H., Shinebourne E. A. Study of cardiac arrhythmias and other forms of conduction abnormality in newborn infants. Br Med J. 1977 Sep 3;2(6087):597–599. doi: 10.1136/bmj.2.6087.597. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Southall D. P., Richards J., Brown D. J., Johnston P. G., de Swiet M., Shinebourne E. A. 24-hour tape recordings of ECG and respiration in the newborn infant with findings related to sudden death and unexplained brain damage in infancy. Arch Dis Child. 1980 Jan;55(1):7–16. doi: 10.1136/adc.55.1.7. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Southall D. P., Vulliamy D. G., Davies M. J., Anderson R. H., Shinebourne E. A., Johnson A. M. A new look at the neonatal electrocardiogram. Br Med J. 1976 Sep 11;2(6036):615–618. doi: 10.1136/bmj.2.6036.615. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Urbach J. R., Phuvichit B., Zweizig H., Millican E., Carrington E. R., Loveland M., Williams J. M., Lambert R. L., Duncan A. M., Farrell S. L. Instantaneous heart rate patterns in newborn infants. Am J Obstet Gynecol. 1965 Dec 1;93(7):965–974. doi: 10.1016/0002-9378(65)90157-2. [DOI] [PubMed] [Google Scholar]
  12. VALLBONA C., DESMOND M. M., RUDOLPH A. J., PAP L. F., HILL R. M., FRANKLIN R. R., RUSH J. B. CARDIODYNAMIC STUDIES IN THE NEWBORN. II. REGULATION OF THE HEART RATE. Biol Neonat. 1963;5:159–199. doi: 10.1159/000239868. [DOI] [PubMed] [Google Scholar]
  13. Välimäki I., Tarlo P. A. Heart rate patterns and apnea in newborn infants. Am J Obstet Gynecol. 1971 Jun 1;110(3):343–349. doi: 10.1016/0002-9378(71)90724-1. [DOI] [PubMed] [Google Scholar]
  14. Yabek S. M., Swensson R. E., Jarmakani J. M. Electrocardiographic recognition of sinus node dysfunction in children and young adults. Circulation. 1977 Aug;56(2):235–239. doi: 10.1161/01.cir.56.2.235. [DOI] [PubMed] [Google Scholar]

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