Publication :
Dobutamine stress echocardiography in healthy adult male rats

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Date
2005-10-26
Direction de publication
Direction de recherche
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Éditeur
BioMed Central
Projets de recherche
Structures organisationnelles
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Résumé
Background : Dobutamine stress echocardiography is used to investigate a wide variety of heart diseases in humans. Dobutamine stress echocardiography has also been used in animal models of heart disease despite the facts that the normal response of healthy rat hearts to this type of pharmacological stress testing is unknown. This study was performed to assess this normal response. Methods : 15 normal adult male Wistar rats were evaluated. Increasing doses of dobutamine were infused intravenously under continuous imaging of the heart by a 12 MHz ultrasound probe. Results : Dobutamine stress echocardiography reduced gradually LV diastolic and systolic dimensions. Ejection fraction increased by a mean of +24% vs. baseline. Heart rate increased progressively without reaching a plateau. Changes in LV dimensions and ejection fraction reached a plateau after a mean of 4 minutes at a constant infusion rate. Conclusion : DSE can be easily performed in rats. The normal response is an increase in heart rate and ejection fraction and a decrease in LV dimensions. A plateau in echocardiographic measurements is obtained after 4 minutes of a constant infusion rate in most animals.
Description
Revue
Cardiovascular ultrasound, Vol. 3 (34), 1-7 (2005)
DOI
10.1186/1476-7120-3-34
URL vers la version publiée
Mots-clés
Dobutamine , Stress echocardiography , Rat , Animal model , Stress
Citation
Type de document
article de recherche