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Pulmonary arterial pulse wave velocity measurement in horses

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dc.contributor.advisor Arroyo, Luis
dc.contributor.author Teixeira de Almeida e Silva, Gonçalo Manuel
dc.date.accessioned 2017-07-13T19:29:47Z
dc.date.available 2017-07-13T19:29:47Z
dc.date.copyright 2017
dc.date.created 2017-06-12
dc.date.issued 2017-07-13
dc.identifier.uri http://hdl.handle.net/10214/11173
dc.description.abstract Calcification of the tunica media of the main pulmonary arteries (PA) has been reported in a large proportion of racehorses. In humans, medial calcification is a significant cause of arterial stiffening and is implicated in the pathogenesis of cardiac, cerebral and renal microvascular diseases, as well as pulmonary hypertension. Pulse wave velocity (PWV) provides a measure of arterial stiffness. This study aimed to develop a technique to determine PA-PWV in standing sedated horses, and secondarily to investigate a potential association between PA-PWV and the presence of fibro-calcified lesions in the PA of these animals. A dual pressure sensor catheter (PSC) was placed in the main PA of 13 sedated horses. The pressure waves recorded from 10 of those horses were used to determine PWV along the PA. The method used for PWV determination was the statistical phase offset, a method developed from data collected during this study. Histological analysis of the PA was performed to investigate the presence of fibro-calcified lesions. The mean ±SD PWV was 2.3±0.7m/s in the proximal PA trunk and 1.1±0.1m/s further distal (15cm) in a main PA branch. The mean ±SD of mean arterial pressures in the proximal PA trunk was 30.1±5.2mmHg, and 22.0±6.0mmHg further distal (15cm) within the main PA branch. The mean ±SD pulse pressure in the proximal PA trunk was 15.0±4.7mmHg, and 13.5±3.3mmHg further distal (15cm) within the main PA branch. Moderate to severe lesions of the tunica media of the PAs were observed in 7/10 horses, but a correlation with PWV could not be established with the data collected. Pulmonary artery PWV may be determined in standing horses. The technique described could allow further investigation of the effect of calcification of large PAs in the pathogenesis of equine pulmonary circulatory disorders. en_US
dc.description.sponsorship Equine Guelph, OMAFRA en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-ShareAlike 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/2.5/ca/ *
dc.subject Horse en_US
dc.subject Equine en_US
dc.subject Pulmonary en_US
dc.subject Artery en_US
dc.subject Stiffness en_US
dc.subject Calcification en_US
dc.subject Pulse wave velocity en_US
dc.subject PWV en_US
dc.title Pulmonary arterial pulse wave velocity measurement in horses en_US
dc.type Thesis en_US
dc.degree.programme Veterinary Science en_US
dc.degree.name Doctor of Veterinary Science en_US
dc.degree.department Department of Clinical Studies en_US


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Attribution-NonCommercial-ShareAlike 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 2.5 Canada