Calculation of aortic regurgitant volume by a new digital Doppler color flow mapping method: an animal study with quantified chronic aortic regurgitation

Détails

ID Serval
serval:BIB_F0A88EC1FE61
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Calculation of aortic regurgitant volume by a new digital Doppler color flow mapping method: an animal study with quantified chronic aortic regurgitation
Périodique
Journal of the American College of Cardiology
Auteur(s)
Shiota  T., Jones  M., Aida  S., Tsujino  H., Yamada  I., Delabays  A., Pandian  N. G., Sahn  D. J.
ISSN
0735-1097 (Print)
Statut éditorial
Publié
Date de publication
09/1997
Volume
30
Numéro
3
Pages
834-42
Notes
Comparative Study
Journal Article
Research Support, U.S. Gov't, P.H.S. --- Old month value: Sep
Résumé
OBJECTIVES: The aim of the present study was to quantitate aortic regurgitant volume and regurgitant fraction in a chronic animal model with surgically created aortic regurgitation using a new semiautomated color Doppler flow calculation method. BACKGROUND: The conventional noninvasive methods for evaluating the severity of aortic regurgitation have not been accepted widely nor compared with truly quantitative reference standards. METHODS: Eight to 20 weeks after aortic regurgitation was surgically induced in six sheep, a total of 22 hemodynamic states were studied. Electromagnetic flow probes and meters provided reference flow data. Epicardial color Doppler echocardiographic studies were performed to image left ventricular outflow tract forward and aortic regurgitant blood flows. The new method digitally integrated spatial and temporal color flow velocity data for left ventricular outflow tract forward flow and ascending aortic regurgitant flow. The pulsed Doppler method using the velocity-time integral was also used to obtain regurgitant volumes and regurgitant fractions. RESULTS: Regurgitant volumes and regurgitant fractions by the new method agreed well with those obtained electromagnetically, whereas the pulsed Doppler method overestimated these reference data (mean [+/-SD] difference 0.23 +/- 2.9 ml vs. 11 +/- 5.8 ml, p < 0.0001 for regurgitant volume; mean difference 1.2 +/- 7.6% vs. 19 +/- 13%, p < 0.0001 for regurgitant fraction). CONCLUSIONS: This animal study, using strictly quantified aortic regurgitant volumes, demonstrated that the digital color Doppler method provides accurate aortic regurgitant volumes and regurgitant fractions without cumbersome measurements.
Mots-clé
Animals Aortic Valve/physiopathology/ultrasonography Aortic Valve Insufficiency/physiopathology/*ultrasonography Blood Flow Velocity Cardiac Output Chronic Disease Echocardiography, Doppler, Color/instrumentation/*methods Echocardiography, Doppler, Pulsed Mathematical Computing Sheep Signal Processing, Computer-Assisted Stroke Volume
Pubmed
Web of science
Création de la notice
28/01/2008 10:48
Dernière modification de la notice
03/03/2018 22:37
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