| The neonatal transitional circulation: a combined noninvasive assessment. | |
| | |
MedLine Citation:
|
PMID: 10149867 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Dramatic changes occur in the circulation of the newborn during the transition from fetal to neonatal life. Closure of the foramen ovale and ductus arteriosus, decrease in pulmonary vascular resistance, and improvement in right ventricular compliance are among these changes. These physiological-anatomical events were characterized by means of two-dimensional, Doppler and color flow echocardiography. Forty-five full-term infants (22 male, 23 female) were studied at a mean age of 4.2 hours (T1), 25.5 hours (T2), 49.8 hours (T3), and 73.8 hours (T4) by two-dimensional, Doppler and color flow echocardiography. At T1, T2, T3, and T4, the ductus arteriosus was patent by color flow echocardiography in 100%, 34%, 22%, and 11%, respectively. Conversely, patency of the ductus by Doppler alone was detected in 100% (T1), 13% (T2, T3), and 11% (T4). Reversal of flow in the descending aorta, reflective of diastolic ductal filling, was not sensitive in detecting ductal patency (T1 50%, T2 3%, T3 and T4 0%). The patency of the foramen ovale was noted to decrease over the course of the study. Right ventricular compliance was quantitatively assessed by pulsed-Doppler diastolic properties (E-to-A ratio). This changed significantly from T1 to T4 (0.90 to 0.97) reflecting improving compliance of the right ventricle. The ratio of acceleration to ejection time, a Doppler estimation measure of pulmonary vascular resistance, increased from 0.28 to 0.33 (T1 to T4) reflecting a decrease in pulmonary vascular resistance.(ABSTRACT TRUNCATED AT 250 WORDS) |
| | |
Authors:
|
D S Alenick; I R Holzman; S B Ritter |
Related Documents
:
|
10620767 - Direct visualization of blood flow through the interaortic foramen of the eastern diamo... 8250287 - Repeated interruptions of the testicular blood flow do not have long-term effects on sp... 12202717 - Relative cerebral blood volume measurements in intracranial mass lesions: interobserver... 18547387 - Effect of hormone replacement therapy on clitoral artery blood flow in healthy postmeno... 11451647 - Automatic multicommmutated flow system for diffusion studies of pharmaceuticals through... 7539767 - The blood flow in pancreatico-duodenal grafts in rats: inhibition of nitric oxide synth... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Echocardiography (Mount Kisco, N.Y.) Volume: 9 ISSN: 0742-2822 ISO Abbreviation: Echocardiography Publication Date: 1992 Jan |
Date Detail:
|
Created Date: 1992-08-27 Completed Date: 1992-08-27 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 8511187 Medline TA: Echocardiography Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 29-37 Citation Subset: T |
Affiliation:
|
Division of Pediatric Cardiology, Mount Sinai Medical Center, New York 10029. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Blood Circulation
/
physiology* Ductus Arteriosus, Patent / physiopathology, ultrasonography Echocardiography / methods Heart Septal Defects, Atrial / physiopathology, ultrasonography Humans Infant, Newborn / physiology* Pulmonary Artery / physiology, ultrasonography Tricuspid Valve Insufficiency / physiopathology, ultrasonography Ventricular Function, Right / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The value of transesophageal echocardiography in the diagnosis of cardiac metastasis.
Next Document: Experimental studies to define the geometry of the flow convergence region. Laser Doppler particle t...