| Doppler velocity and flow through the aortic isthmus in normal term neonates. | |
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MedLine Citation:
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PMID: 10516416 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Our hypothesis was that the relationship between the internal aortic diameter and the Doppler flow velocity across the aortic isthmus could be modeled by applying the principle of conservation of mass flow. The aortic diameter decreased at the isthmus by a mean of 18% (t = 11.02, p < 0.0001), while the flow velocity increased by a mean of 44% (t = 10.09, p < 0.0001). The mean peak mass flow rate was 34. 5 ml/s preisthmus and 32.9 ml/s at the isthmus with excellent correlation (r = 0.830). We conclude that the increase in Doppler velocity observed in the descending aorta can be explained by the normal narrowing observed at the aortic isthmus and application of the continuity equation for conservation of mass flow. |
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Authors:
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A Ithuralde; T Riggs; M E Hussey; E Weinhouse |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Cardiology Volume: 91 ISSN: 0008-6312 ISO Abbreviation: Cardiology Publication Date: 1999 |
Date Detail:
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Created Date: 1999-11-18 Completed Date: 1999-11-18 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 1266406 Medline TA: Cardiology Country: SWITZERLAND |
Other Details:
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Languages: eng Pagination: 205-9 Citation Subset: IM |
Affiliation:
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Pediatric Cardiology, William Beaumont Hospital, Royal Oak, MI 48073, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aorta, Thoracic
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physiology* Blood Pressure Ductus Arteriosus, Patent / physiopathology* Humans Infant, Newborn / physiology* Prospective Studies Regional Blood Flow |
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