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20181
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Subject: Veterinary Anatomy × Author: SWETHA, PANDIKUNTA × End date: 2020 × Start date: 2017 ×
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    ThesisItemOpen Access
    COMPUTED RADIOGRAPHIC STUDIES ON SIZE OF THE HEART BASED ON VERTEBRAL HEART SCORE IN DOGS AT DIFFERENT AGE GROUPS
    (SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517502. (A.P.) INDIA, 2018-12) SWETHA, PANDIKUNTA; KISHORE, P. V.S.(MAJOR); NAGAMALLESWARI, Y; RAGHUNATH, M
    The present study was conducted on 54 clinically healthy dogs of either sex without any cardiac and pulmonary abnormalities. Computed thoracic radiographs available from the recorded data were studied to determine the VHS values in different skull types with one breed as representative sample in each type viz. Brachycephalic (Pug), Mesaticephalic (Labrador retriever) and Dolichocephalic (German shepherd). Dogs in each breed were divided into three age groups viz. group-I (< 6 months), group-II (7-12 months) and group III (>12 months). In Pugs, the gross anatomical size of the heart increased from the age of 6 months to >12 months on left lateral, right lateral and dorsoventral views (p<0.01). There was no significant increase in the gross anatomical size of the heart on manually measured left lateral and right lateral views. Higher VHS values were observed on the right lateral projection than on left lateral projection in both CR and manual methods in all the age groups of all the three breeds. VHS values were not influenced by the age in all the three age groups. There was no significant increase in the gross anatomical size of the heart on left lateral, right lateral and dorsoventral views both by CR and manual measurement. In a comparison of CR and manual methods, the manual VHS values were higher compared to the CR values in both lateral views in Pugs and German shepherd dogs. In Labrador retrievers, the CR VHS values were higher compared to the manual values in both lateral views. There was no significant increase in the gross anatomical size of the heart among the three age groups in the Labrador retrievers and German shepherds. There was no significant variation in the gross anatomical size of the heart up to 12 months of age and at more than 12 months of age the size of the heart was increased markedly in Pugs. In all age groups, the VHS values were highest in Pugs followed by Labrador retrievers and German shepherds, indicating that the size of the heart was larger in Pugs followed by Labrador retrievers and German shepherds. There was no correlation between the body weight and the VHS values among all the three age groups in all the three breeds. In addition to the variations among the three age groups within each breed, variations among the three breeds within the same age group were also found. Group-I showed no variation in all views. Group-II showed no variation on LL, RL and DV views. Group-III showed no variation only in DV view. All haematological and serum biochemical values calculated were within the normal reference range indicating the normal health status of the dogs.