Document Detail

Effects of enalaprilat on cardiorespiratory, hemodynamic, and hematologic variables in exercising horses.
MedLine Citation:
PMID:  11453472     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the effects of IV administration of enalaprilat on cardiorespiratory and hematologic variables as well as inhibition of angiotensin converting enzyme (ACE) activity in exercising horses. ANIMALS: 6 adult horses. PROCEDURE: Horses were trained by running on a treadmill for 5 weeks. Training was continued throughout the study period, and each horse also ran 2 simulated races at 120% of maximum oxygen consumption. Three horses were randomly selected to receive treatment 1 (saline [0.9% NaCl] solution), and the remaining 3 horses received treatment 2 (enalaprilat; 0.5 mg/kg of body weight, IV) before each simulated race. Treatment groups were reversed for the second simulated race. Cardiorespiratory and hematologic data were obtained before, during, and throughout the 1-hour period after each simulated race. Inhibition of ACE activity was determined during and after each race in each horse. RESULTS: Exercise resulted in significant increases in all hemodynamic variables and respiratory rate. The pH and PO2 of arterial blood decreased during simulated races, whereas PCO2 remained unchanged. Systemic and pulmonary blood pressure measurements and arterial pH, PO2, and Pco2 returned to baseline values by 60 minutes after simulated races. Enalaprilat inhibited ACE activity to < 25% of baseline activity without changing cardiorespiratory or blood gas values, compared with horses administered saline solution. CONCLUSIONS AND CLINICAL RELEVANCE: Enalaprilat administration almost completely inhibited ACE activity in horses without changing the hemodynamic responses to intense exercise and is unlikely to be of value in preventing exercise-induced pulmonary hemorrhage.
W W Muir; R A Sams; J A Hubbell; K W Hinchcliff; J Gadawski
Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of veterinary research     Volume:  62     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-07-16     Completed Date:  2001-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1008-13     Citation Subset:  IM    
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus 43210-1089, USA.
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MeSH Terms
Angiotensin-Converting Enzyme Inhibitors / pharmacology*
Blood Pressure / drug effects
Carbon Dioxide / blood
Cardiac Output / drug effects
Cross-Over Studies
Enalaprilat / pharmacology*
Heart Rate / drug effects
Horses / blood,  physiology*
Oxygen / blood
Partial Pressure
Peptidyl-Dipeptidase A / blood
Physical Conditioning, Animal / physiology*
Respiration / drug effects
Reg. No./Substance:
0/Angiotensin-Converting Enzyme Inhibitors; 124-38-9/Carbon Dioxide; 7782-44-7/Oxygen; 84680-54-6/Enalaprilat; EC A

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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