The information in this document is supplied solely as a resource for journalists. Any questions about your veterinary healthcare or treatment should be The QUEST trial is the largest global clinical study of its kind ever to be conducted amongst dogs with congestive heart failure. QUEST stands for Quality of Life and Extension of Survival Time, and was an international, multi-
centre clinical trial comparing two treatments used to combat congestive Overview
• Comparison of pimobendan (Vetmedin®) and an ACE-inhibitor treatment (benazepril hydrochloride) in dogs with myxomatous mitral valve disease • 260 dogs enrolled across 11 countries Study Aims
Primary: To assess the effect of pimobendan therapy on survival time, in
comparison with benazepril hydrochloride, in dogs with congestive heart • Secondary: To assess the effect of pimobendan on quality of life in dogs with
Patient Inclusion Criteria
• MMVD, confirmed by ultrasound of the heart chambers and valves • Pulmonary oedema (fluid build-up in the lungs) confirmed by radiography Patient Exclusion Criteria
• Other significant conditions, e.g. heart, kidney, liver, stomach or intestinal Trial Design
QUEST was a randomised, positive-controlled, multi-centre trial conducted at 28 sites across Australia, Canada and Europe. The clinical phase of the trial ran for three years. After recruitment, patients were randomly allocated to either a pimobendan or benazepril hydrochloride treatment group, each group consisting of 130 dogs. The trial followed dogs to death, euthanasia or treatment failure leading to withdrawal from the trial. Dosing Schedule
The pimobendan treatment group received a daily dose of 0.4-0.6mg/kg, using a suitable number of 1.25mg or 2.5mg capsules depending on weight, which were administered twice daily. The benazepril hydrochloride group received 0.25-0.5mg/kg daily, adjusted to a suitable number of 5mg tablets, according to the manufacturer's recommendation - this dose could be doubled at the request of the Investigator. The UK datasheets for both medicines can be All dogs in the study received furosemide as required. Measurement Of Treatment Effects
• Respiratory: respiratory effort, coughing, shortness of breath or coughing at • Circulatory: heart rate, heart failure score, electrocardiography and The first round of results from the QUEST study have been published in the September/October 2008 issue of the peer-reviewed Journal of Veterinary • When considering the total study population, the median survival time for "all dogs" was 188 days
• The median survival* of dogs receiving pimobendan was 267 days,
compared to 140 days for those receiving benazepril hydrochloride*
• Survival* was extended by 91% in dogs receiving pimobendan compared
* Survival was defined as the composite endpoint of cardiac death, euthanasia due to heart failure or treatment failure † Häggström J et al. Effect of pimobendan or benazepril hydrochloride on survival times in dogs with congestive heart failure caused by naturally occurring myxomatous mitral valve disease: the QUEST study. J Vet Intern Med; Vol 22:5, 2008 "The study offers the most compelling evidence to date demonstrating the beneficial effect of pimobendan when compared to benazepril for extending survival in dogs with CHF due to MMVD when used in conjunction with other For further information on the QUEST study and its findings, Provided as a service by Boehringer Ingelheim Ltd, Bracknell, Berkshire, RG12 8YS, UK. Vetmedin contains pimobendan. Prescription only medicine. Date of preparation:


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