| Incomplete baroreceptor responses in newborn infants. | |
| | |
MedLine Citation:
|
PMID: 3986024 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Previous studies of the baroreceptor response to a 45 degree head-up tilt in preterm and mature infants during the first 3 days of life failed to demonstrate a significant tachycardia while eliciting a 25% reduction in limb blood flow. In order to determine if maturity or respiratory distress affected the presence of tachycardia after tilting, 34 infants between 28 and 40 weeks gestation, including 15 infants with RDS, were studied serially during their hospitalization in a neonatal intensive care unit. In the first 5 seconds after a rapid (1-second) tilt to 45 degrees, individual infants responded with changes in heart rate (HR) ranging from a fall of 8 beats/min to an increase of 13 beats/min. Individual responses were not predictable on the basis of maturity at birth, age after birth, or presence of clinical respiratory distress. The group as a whole demonstrated a statistically significant increase of 2 +/- 4 beats/min in the first 5 seconds immediately after tilting. This may be compared to a coefficient of variation of +/- 4-5% in the resting HR of the same group of infants. Because of the unpredictability of individual responses and the small magnitude of the response for the group as a whole, it can be concluded that the HR component of the baroreceptor response is poorly developed during the neonatal period. |
| | |
Authors:
|
K Holden; J S Morgan; A N Krauss; P A Auld |
Related Documents
:
|
161694 - The fibrinolysin system and its relationship to disease in the newborn. 23443624 - A case of neonatal tetanus presented within 24 hours of life. 22364884 - Polymorphisms of slc30a2 and selected perinatal factors associated with low milk zinc i... 10729724 - Timing of surfactant administration determines its physiologic response in a rabbit mod... 7485304 - A multicenter randomized controlled trial of home uterine monitoring: active versus sha... 16556644 - Post-neonatal mortality in norway 1969-95: a cause-specific analysis. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: American journal of perinatology Volume: 2 ISSN: 0735-1631 ISO Abbreviation: Am J Perinatol Publication Date: 1985 Jan |
Date Detail:
|
Created Date: 1985-06-17 Completed Date: 1985-06-17 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 8405212 Medline TA: Am J Perinatol Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 31-4 Citation Subset: IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Gestational Age Heart Rate* Humans Infant, Newborn* Infant, Premature* Pressoreceptors / physiology* Respiratory Distress Syndrome, Newborn / physiopathology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Gestational age and the management of preterm labor in obstetric programs.
Next Document: VATER association: analysis of growth and development.