The aim of this study was to evaluate the ratio of connective tissue on the right and left ventricule of the cardiac muscle in the dog. Throughout the morphometric study, we can gather information regarding the relationship between the connective and the muscle tissue, in order to find out the anatomic and functional relationship of the heart, which can provide information as for the diseases of the heart. In this study, we evaluated the heart of 6 dogs, males and females, from 48 to 150 months-old, whose weight ranged from 18 to 30 kilograms, with no heart diseases confirmed by eletrocardographic and echocardiographic examinations. We got sample from 3 different regions of the ventricule, on the proximal, medial and distal faces, both on the right and left parts. We used the Picrosirius red and Gomori's Trichrome to stain the material and bring out the connective fibers. We evaluated the slides by Axioscope Zeissâ with program KS400 analyse of images. The amount of connective tissue on the left ventricule ranged from 0.44 to 26.26%. On the right ventricule, it ranged from 0.97 to 21.18%. On the apex, it ranged from 1.32 to 29.24% and on the septo interventricular, it ranged from 5.41 to 11.24%. The results showed that there is a accureted connective fibers pattern surrounding the cardiac muscle tissue and it has an assorted amount and arrangement of fibers.
Dogs; Heart; Myocardium; Connective tissue; Collagen
