Myoendocardial formations of heart atria and ventricles of the female Amur leopard cat (Prionailurus bengalensis euptilurus) in normal fertile age

The object of the study is the hearts of four young reproductive females of the Amur leopard cat, a rare mammal representative of the cat family. The animal is untamed and lives only in the wild. The material was selected during the autopsy according to generally accepted methods. The age of the studied individuals of the Amur leopard cat was determined taking into account the data; the internal structure features of the heart were studied. Earlier, we described the morphometric parameters of different age groups male hearts. The heart of the studied individuals is slender, ellipsoid in shape; the myoendocardial formations of the atria have a well-defined ridge-like structure. The walls of the ventricles are characterized by pronounced trabeculation. The papillary and trabecular complex includes: trabeculae carneae of varying intensity, depending on the localization on the wall; septomarginal trabeculae that have their own distinctive features in the right and left ventricles; main and additional papillary muscles. The septomarginal trabeculae of the right ventricle have a pronounced muscular structure; the corresponding formations of the left ventricle are thin, tendon-like, significantly exceeding the first in length. The most pronounced papillary muscles are localized in the left ventricle. Papillary muscles of the right ventricle are expressed slightly, with the exception of the parietal muscles