Header

UZH-Logo

Maintenance Infos

Effect of pimobendan on left atrial function: an echocardiographic pilot study in 11 healthy cats


Baron Toaldo, Marco; Pollesel, M; Diana, A (2020). Effect of pimobendan on left atrial function: an echocardiographic pilot study in 11 healthy cats. Journal of Veterinary Cardiology, 28:37-47.

Abstract

Objectives: To evaluate the effect of a single dose of pimobendan on left atrial (LA) function in healthy cats.
Animals: Eleven client owned healthy cats.
Material and methods: - Standardized and repeated echocardiographic examinations were performed on healthy and conscious cats before and after a single dose of orally administered pimobendan (1.25 mg/cat). Left atrial systolic functional parameters were assessed.
Results: Some of the tested parameters of LA function showed significant improvement after pimobendan administration, whereas no significant effect on left ventricular function was observed. In particular, LA minimal diameters obtained from M-mode images in short (p=0.018) and long (p=0.009) axis reduced after pimobendan administration, whereas LA fractional shortening from short (p=0.027) and long (p=0.042) axis and LA appendage emptying velocity (p<0.001) significantly increased. A mild increase in heart rate (p=0.001), and a transient increase on the peak systolic wave pulmonary vein velocity (p=0.008) were also recorded as a possible effect.
Conclusions: A single dose of pimobendan appears to impact LA function in healthy cats. However, because of the small number of cats included, and the absence of a placebo group, these results cannot be definitively separated from the effect of time. Additional studies are needed to understand if similar effects are observed in cats with cardiomyopathy and LA dilatation.

Abstract

Objectives: To evaluate the effect of a single dose of pimobendan on left atrial (LA) function in healthy cats.
Animals: Eleven client owned healthy cats.
Material and methods: - Standardized and repeated echocardiographic examinations were performed on healthy and conscious cats before and after a single dose of orally administered pimobendan (1.25 mg/cat). Left atrial systolic functional parameters were assessed.
Results: Some of the tested parameters of LA function showed significant improvement after pimobendan administration, whereas no significant effect on left ventricular function was observed. In particular, LA minimal diameters obtained from M-mode images in short (p=0.018) and long (p=0.009) axis reduced after pimobendan administration, whereas LA fractional shortening from short (p=0.027) and long (p=0.042) axis and LA appendage emptying velocity (p<0.001) significantly increased. A mild increase in heart rate (p=0.001), and a transient increase on the peak systolic wave pulmonary vein velocity (p=0.008) were also recorded as a possible effect.
Conclusions: A single dose of pimobendan appears to impact LA function in healthy cats. However, because of the small number of cats included, and the absence of a placebo group, these results cannot be definitively separated from the effect of time. Additional studies are needed to understand if similar effects are observed in cats with cardiomyopathy and LA dilatation.

Statistics

Citations

Altmetrics

Downloads

0 downloads since deposited on 17 Jun 2020
0 downloads since 12 months

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Scopus Subject Areas:Life Sciences > Physiology
Health Sciences > General Veterinary
Uncontrolled Keywords:Physiology, General Veterinary, Atrium; Contractility; Echocardiography; Feline; Hypertrophic cardiomyopathy
Language:English
Date:1 April 2020
Deposited On:17 Jun 2020 14:22
Last Modified:29 Jul 2020 15:17
Publisher:Elsevier
ISSN:1760-2734
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.jvc.2020.02.002
PubMed ID:32244178

Download

Closed Access: Download allowed only for UZH members