Document Detail

Exercise-induced pulmonary haemorrhage in the horses: results of a detailed clinical, post mortem and imaging study. VII. Ventilation/perfusion scintigraphy in horses with EIPH.
MedLine Citation:
PMID:  3678185     Owner:  NLM     Status:  MEDLINE    
Detailed post mortem examination of the lungs of horses with exercise-induced pulmonary haemorrhage (EIPH) has demonstrated significant small airway disease and intense bronchial arterial proliferation in the dorsocaudal lungfields. The purpose of this study was to investigate ventilation and perfusion distribution in the lungs of a similar group of horses to compare changes in the live animal with the previously reported post mortem findings. Thoracic radiography and ventilation/perfusion (V/Q) scintigraphy were performed on five racing Thoroughbreds with recent histories of EIPH. Parametric images of V/Q ratios for left and right lungfields were also generated from the scan images. In all horses, ventilation and perfusion deficits were demonstrated in the dorsocaudal areas of the lung corresponding closely to the observed radiographic lesions. In particular, the perfusion images and V/Q ratio displays indicated that, in affected areas of lung, pulmonary arterial perfusion was the more seriously impaired. This finding appears to confirm the post mortem evidence of reduced pulmonary arterial perfusion and bronchial arterial dominance in these areas. Ventilation deficits in the same areas also confirmed the likelihood of partial airway obstruction consistent with the small airway disease noted in previous post mortem observations. These results suggest that the vascular and airway lesions demonstrated in detailed post mortems of horses with EIPH are also functionally important in affected horses, even at rest. As a consequence of the apparent persistent, insidious and progressive nature of the lesions associated with EIPH there are serious long term implications for management of the condition.
M W O'Callaghan; W J Hornof; P E Fisher; J R Pascoe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Equine veterinary journal     Volume:  19     ISSN:  0425-1644     ISO Abbreviation:  Equine Vet. J.     Publication Date:  1987 Sep 
Date Detail:
Created Date:  1988-01-21     Completed Date:  1988-01-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  423-7     Citation Subset:  IM; S    
Department of Radiological Sciences, School of Veterinary Medicine, University of California, Davis 95616.
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MeSH Terms
Hemorrhage / radionuclide imaging,  veterinary*
Horse Diseases / radionuclide imaging*
Lung / radionuclide imaging*
Lung Diseases / radionuclide imaging,  veterinary*
Physical Exertion*
Ventilation-Perfusion Ratio / veterinary*

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

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