| Cyclical variations in cerebral blood flow velocity. | |
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MedLine Citation:
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PMID: 1996887 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Because little is known about spontaneous changes in cerebral blood flow in neonates, a newly developed online Doppler technique was used to insonate continuously the middle cerebral arteries of a group of sick (n = 20) and full term healthy (n = 16) newborn infants for a period of one minute. A total of 290 recordings of epochs each lasting one minute were analysed, and pronounced regular, cyclical variations were seen in the velocity traces of these infants. The cycles occurred 1.5-5 times/minute and were present for at least one epoch in all 20 of the sick infants and in 15 of the 16 healthy mature neonates. Simultaneous recordings of the systemic blood pressure in the sick infants rarely showed the same cyclical variations. The cyclical variation is different from the beat to beat variability seen in the waveforms previously described, and is an additional factor to account for the wide variation in 'normal' velocity recordings obtained when Doppler ultrasound is measured over a short period of time. |
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Authors:
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M Y Anthony; D H Evans; M I Levene |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Archives of disease in childhood Volume: 66 ISSN: 1468-2044 ISO Abbreviation: Arch. Dis. Child. Publication Date: 1991 Jan |
Date Detail:
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Created Date: 1991-03-27 Completed Date: 1991-03-27 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 0372434 Medline TA: Arch Dis Child Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 12-6 Citation Subset: AIM; IM |
Affiliation:
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Department of Paediatrics, University of Leeds, General Infirmary. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity
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physiology Cerebral Arteries / physiology*, ultrasonography Cerebrovascular Circulation / physiology Humans Infant Infant, Newborn / physiology* Infant, Premature / physiology Intensive Care Units, Neonatal Monitoring, Physiologic / methods |
| Comments/Corrections | |
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