title: Correlation between caudal pulmonary artery diameter to body surface area ratio and echocardiography-estimated systolic pulmonary arterial pressure in dogs.
abstract: Caudal pulmonary artery diameter (CPAD) to body surface area (BSA) ratios were measured in ventrodorsal thoracic radiographs to assess the correlation between CPAD to BSA ratios and systolic pulmonary arterial pressure (PAP) in dogs. Thoracic radiographs of 44 dogs with systolic pulmonary arterial hypertension (PAH) and 55 normal dogs were evaluated. Systolic PAP was estimated by Doppler echocardiography. CPADs were measured at their largest point at the level of tracheal bifurcation on ventrodorsal radiographs. Both right and left CPAD to BSA ratios were significantly higher in the PAH group than in the normal group (p < 0.0001). Linear regression analysis showed positive associations between PAP and right and left CPAD to BSA ratio (right, p = 0.0230; left, p = 0.0012). The receiver operating characteristic curve analysis revealed that the CPAD to BSA ratio had moderate diagnostic accuracy for detecting PAH. The operating point, sensitivity, specificity, and area under the curve were 28.35, 81.40%, 81.82%, and 0.870; respectively, for the right side and 26.92, 80.00%, 66.67%, and 0.822, respectively, for the left. The significant correlation of CPAD to BSA ratio with echocardiography-estimated systolic PAP supports its use in identifying PAH on survey thoracic radiographs in dogs.
authors.affiliation: Section of Medical Imaging, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Youngjae
authors.initials: Y
authors.lastname: Lee
authors.affiliation: Section of Medical Imaging, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Wooshin
authors.initials: W
authors.lastname: Choi
authors.affiliation: Section of Medical Imaging, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Donghoon
authors.initials: D
authors.lastname: Lee
authors.affiliation: Section of Medical Imaging, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Jinhwa
authors.initials: J
authors.lastname: Chang
authors.affiliation: Laboratory of Veterinary Internal Medicine, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Ji-Houn
authors.initials: JH
authors.lastname: Kang
authors.affiliation: Veterinary Medical Imaging, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea.
authors.forename: Jihye
authors.initials: J
authors.lastname: Choi
authors.affiliation: Section of Medical Imaging, Veterinary Medical Center, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Dongwoo
authors.initials: D
authors.lastname: Chang
mesh_terms: D000818:Animals; D001830:Body Surface Area / Q000662:veterinary*; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D015150:Echocardiography, Doppler / Q000662:veterinary; D006976:Hypertension, Pulmonary / Q000000981:diagnostic imaging / Q000662:veterinary*; D011651:Pulmonary Artery / Q000033:anatomy & histology*; D012372:ROC Curve; D012016:Reference Values; D056910:Republic of Korea; D012189:Retrospective Studies; D012680:Sensitivity and Specificity
keywords: body surface area; caudal pulmonary artery; dog; echocardiography; pulmonary hypertension