{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,20]],"date-time":"2026-02-20T10:01:03Z","timestamp":1771581663352,"version":"3.50.1"},"reference-count":34,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T00:00:00Z","timestamp":1771459200000},"content-version":"vor","delay-in-days":171,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T00:00:00Z","timestamp":1756252800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Cornell Richard P. Riney Canine Health Center via Cornell University College of Veterinary Medicine Resident Research Grants Program"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Determining right ventricular (RV) volume typically requires three-dimensional imaging due to its complex shape. The ellipsoid model offers a two-dimensional alternative, employing area- or linear-based formulas with further variations depending on the echocardiographic views used for measurements.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Hypothesis\/Objectives<\/jats:title>\n                    <jats:p>To identify which ellipsoid model variant best agrees with real-time three-dimensional echocardiography (RT3D) as a reference standard and to assess within-day reproducibility.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Animals<\/jats:title>\n                    <jats:p>Sixty-seven client-owned dogs (23 normal, 44 with right-sided heart diseases) underwent echocardiograms, with 20 normal dogs receiving a repeat examination.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Prospective method comparison study. Body weight-indexed end-diastolic (iEDV) and end-systolic volumes (iESV) were calculated across eight ellipsoid model variants. Agreement was assessed using concordance correlation coefficients (rc) and Bland\u2013Altman analysis, while within-day reproducibility was evaluated using intraclass correlation coefficients (ICC) and reproducibility coefficients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The area- and linear-based variants using RV parameters from the left apical four-chamber view and perpendicular diameter from the right parasternal short-axis view (AEMA4C-RPS and LEMA4C-RPS, respectively) were the only methods to achieve moderate agreement with RT3D (rc\u2009&amp;gt;\u20090.90). The AEMA4C-RPS showed no significant systematic bias for iEDV (median of the differences [95% confidence interval]: 0.09 [0.00\u20130.13]), while LEMA4C-RPS exhibited no significant systematic bias for iEDV (0.03 [\u22120.02\u20130.08]) and iESV (0.04 [\u22120.01\u20130.12]), though biases increased at larger volumes. Both methods demonstrated good reproducibility (ICC\u2009&amp;gt;\u20090.75), with iESV reproducibility significantly greater than that of methods using RV parameters from the right parasternal long-axis four-chamber view.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions and Clinical Importance<\/jats:title>\n                    <jats:p>The AEMA4C-RPS and LEMA4C-RPS offer practical RV volume estimates.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jvim.70232","type":"journal-article","created":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T19:10:31Z","timestamp":1756321831000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Comparing Two-Dimensional Ellipsoid Model Variants in Estimating Three-Dimensional Echocardiographic Right Ventricular Volume in Dogs"],"prefix":"10.1093","volume":"39","author":[{"given":"Robert","family":"Ciardullo","sequence":"first","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brittany E.","family":"Tagg","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elisabeth","family":"Nesta","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shana B.","family":"Mintz","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Romain","family":"Pariaut","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2972-0760","authenticated-orcid":false,"given":"Weihow","family":"Hsue","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, Cornell University Department of Clinical Sciences, , Ithaca, New York,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2025,9,1]]},"reference":[{"issue":"5","key":"2026022004013815400_jvim70232-bib-0001","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.jvc.2014.10.003","article-title":"Echocardiographic Assessment of Right Ventricular Systolic Function in Conscious 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