Echocardiographic Assessment of the Canine Right Heart: Reference Intervals and Repeatability

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dc.contributor.authorGentile, Jessica M.en
dc.contributor.committeechairAbbott, Jonathan A.en
dc.contributor.committeememberPanciera, David L.en
dc.contributor.committeememberLarson, Martha M.en
dc.contributor.departmentVeterinary Medical Sciencesen
dc.date.accessioned2017-04-04T19:49:18Zen
dc.date.adate2012-05-08en
dc.date.available2017-04-04T19:49:18Zen
dc.date.issued2012-01-27en
dc.date.rdate2016-09-30en
dc.date.sdate2012-02-10en
dc.description.abstractObjectives: Phase 1) Establish echocardiographic reference intervals for measurements of the normal canine right heart. Phase 2) Describe the repeatability of normal right heart echocardiographic measurements. Phase 3) Describe the repeatability of right heart echocardiographic measurements which predict pulmonary artery pressure. Materials and Methods: Phase 1) 45 healthy adult dogs. Dogs underwent one echocardiographic examination by the same operator. Phase 2) 6 randomly selected dogs from the pool of Phase 1 dogs. Dogs underwent repeated echocardiograms by two operators. Phase 3) 4 client-owned dogs. Dogs underwent repeated echocardiographic examination by two operators. Results: Phase 1) The linear relationship between dimension and transformed body weight was highly variable. For linear dimensions, most of the scaling exponents were close to the theoretical value of 1/3. For area measurements, most of the scaling exponents were close to 2/3. Phase 2) Of the 168 within-day, between-day and between-operator coefficients of variation (CV) generated, 154 (91.7%) were below 15% and 135 (80.4%) were less than 10%. Phase 3) Of the 100 within-day, between-day and between-operator CVs generated, 72 (72%) were below 20% and 46 (46%) were below 10%. Conclusions: The right heart can be measured with relatively low repeatability. Measurement of the tricuspid regurgitation velocity should be the first priority when attempting to predict pulmonary artery pressure. If tricuspid regurgitation is not present, the use of transpulmonic acceleration time (AT) and the ratio of transpulmonic acceleration-to-ejection time (AT:ET) to indirectly assess pulmonary artery pressure is recommended.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-02102012-145359en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02102012-145359/en
dc.identifier.urihttp://hdl.handle.net/10919/76795en
dc.language.isoen_USen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectRepeatabilityen
dc.subjectReference Intervalsen
dc.subjectRight hearten
dc.subjectEchocardiographyen
dc.subjectCanineen
dc.titleEchocardiographic Assessment of the Canine Right Heart: Reference Intervals and Repeatabilityen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineVeterinary Medical Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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