Marbella Fernández David, García Verónica, Santana Alexis José, Montoya-Alonso José Alberto
Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, 35413 Las Palmas de Gran Canaria, Spain.
CEU Small Animal Hospital, 46115 Valencia, Spain.
Animals (Basel). 2023 Aug 18;13(16):2666. doi: 10.3390/ani13162666.
The diagnostic value of the vertebral heart size (VHS) in dogs with mitral valve degeneration (MVD) is compromised when middle thoracic vertebral anomalies are present. The objective of this study was to assess the use of the thoracic inlet heart score (TIHS) to identify left heart enlargement (LHE) secondary to MVD. The cardiac silhouette of 50 clinically healthy dogs and 106 MVD dogs in different stages was assessed on a right lateral chest radiograph. The TIHS and VHS value were calculated for each patient and compared. The TIHS was significantly different between the control dogs and the dogs with MMVD, increasing with disease stage, control 2.91 ± 0.23, Stage B1 2.98 ± 0.36, B2 3.25 ± 0.34, and C 3.53 ± 0.36, < 0.05. A THIS ≥3.3 showed 69% sensitivity and 81% specificity to identify LHE. The TIHS showed moderate correlation with the VHS, LA/Ao, and LVIDDN 0.59, 0.42, and 0.62, respectively. The intraobserver and interobserver agreement were almost perfect, 0.96, and substantial, 0.73. The TIHS method can be used to identify LHE secondary to MMVD on dogs' thoracic radiographs.
当犬存在中胸椎异常时，椎体心脏大小（VHS）对二尖瓣退变（MVD）犬的诊断价值受到影响。本研究的目的是评估胸廓入口心脏评分（TIHS）用于识别继发于MVD的左心扩大（LHE）的效用。对50只临床健康犬和106只处于不同阶段的MVD犬的心脏轮廓进行右侧位胸部X光片评估。计算每只犬的TIHS和VHS值并进行比较。对照犬与二尖瓣黏液样变性（MMVD）犬的TIHS存在显著差异，且随疾病阶段增加，对照组为2.91±0.23，B1期为2.98±0.36，B2期为3.25±0.34，C期为3.53±0.36，<0.05。TIHS≥3.3对识别LHE的敏感性为69%，特异性为81%。TIHS与VHS、左心房/主动脉（LA/Ao）和舒张末期左心室内径（LVIDDN）分别呈中度相关，相关系数为0.59、0.42和0.62。观察者内和观察者间的一致性几乎为完美（0.96）和实质性（0.73）。TIHS方法可用于在犬的胸部X光片上识别继发于MMVD的LHE。
