| Doppler echocardiographic observations of pulmonary and transvalvular velocity changes after birth and during the early neonatal period. | |
| | |
MedLine Citation:
|
PMID: 3825865 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
To evaluate the qualitative and quantitative changes in Doppler velocities in the normal fetus and newborn, 61 echo Doppler studies were performed in 18 neonates, nine of whom were also studied as fetuses. Four studies were inadequate in fetuses (one pulmonary artery, two mitral, and one tricuspid) and some post natal studies were inadequate due to inability to separate atrioventricular valve E and A velocity component waveforms (one tricuspid, three mitral). Heart rates for fetuses and newborns more than 24 hours of age and less than 24 hours of age were similar. Pulmonary artery diastolic velocities consistent with patent ductus arteriosus were present in 11 of 12 examinations at less than 6 hours of age, in 5 of 13 examined at 6 to 24 hours of age, and in 2 of 27 examined after 24 hours of age. Pulmonary artery times to peak velocity were similar in fetuses, m = 46, SD = 3 msec, and in neonates less than 6 hours of age, m = 51, SD = 13 msec, but lengthened significantly, p less than 0.05, at 6 to 24 hours (m = 69, SD = 14 msec). These changes are probably due to the dramatic changes in pulmonary vascular pressure that occur after birth. Data from 6 to 24 hours and greater than 24 hours (m = 78, SD = 13 msec) were similar. Significant differences existed for transmitral valve E/A ratios, which increased from m = 0.85 in utero to m = 1.17 (p less than 0.05) after birth, with no significant change thereafter.(ABSTRACT TRUNCATED AT 250 WORDS) |
| | |
Authors:
|
N Wilson; K Reed; H D Allen; G R Marx; S J Goldberg |
Related Documents
:
|
18267925 - An unusual cause of pacemaker-induced severe tricuspid regurgitation. 11605615 - Minimally invasive removal of a dislocated stent from the right atrium after previous c... 18672165 - Live 3-dimensional transesophageal echocardiography initial experience using the fully-... 9870025 - Radiofrequency catheter ablation of two right mahaïm-like accessory pathways in a pati... 8745125 - Transient left-sided alien hand with callosal and unilateral fronto-mesial damage: a ca... 1436465 - Ascending pharyngeal artery-internal jugular vein fistula complicating radical neck dis... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: American heart journal Volume: 113 ISSN: 0002-8703 ISO Abbreviation: Am. Heart J. Publication Date: 1987 Mar |
Date Detail:
|
Created Date: 1987-04-03 Completed Date: 1987-04-03 Revised Date: 2006-02-27 |
Medline Journal Info:
|
Nlm Unique ID: 0370465 Medline TA: Am Heart J Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 750-8 Citation Subset: AIM; IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Blood Circulation Blood Flow Velocity* Echocardiography* Female Fetal Blood / physiology Heart Valves / physiology* Humans Infant, Newborn Pregnancy Pulmonary Circulation* Ultrasonics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The value of mixed venous oxygen saturation as a therapeutic indicator in the treatment of advanced ...
Next Document: A pulsed Doppler echocardiographic study of the postnatal changes in pulmonary artery and ascending ...