Dobutamine stress echocardiography in healthy adult male rats

Auteur(s): Plante, ÉricLachance, DominicDrolet, Marie-ClaudeRoussel, ÉliseCouët, JacquesArsenault, Marie
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.
Type de document: Article de recherche
Date de publication: 26 octobre 2005
Date de la mise en libre accès: 15 novembre 2017
Version du document: VoR
Lien permanent: http://hdl.handle.net/20.500.11794/15862
Ce document a été publié dans: Cardiovascular ultrasound, Vol. 3 (34), 1-7 (2005)
https://doi.org/10.1186/1476-7120-3-34
BioMed Central
Autre version disponible: 10.1186/1476-7120-3-34
1276802
Collection :Articles publiés dans des revues avec comité de lecture

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