Pesquisa com animais e a cirurgia cardiovascular

Braile, Domingo Marcolino

doi:10.5935/1678-9741.20130068

Cited by 2 publications

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“…Such ambiguous cytometric parameters of the left ventricular myocardium in experimental animals, relative to the right ventricle, are probably related to the activity of the ventricles themselves: the left ventricle functions, in most cases, as a pump, and the right ventricle functions as a volumetric compartment with morphological and functional features of myocardial tissue capable of spontaneous rhythmic contractions, which result in blood flow in the vessels. At the same time, the cardiomyocytes of the left ventricle provide a greater load, promoting blood flow through the vessels of the corporal (large) circulation, and the cardiomyocytes of the right ventricle, respectively, have a much lower load, ensuring blood flow through the vessels of the small circulation (Halıgür et al, 2009;Braile, 2013). Thus, the studies have shown that the morphological structure of the sheep heart myocardium has similar macro-and histoarchitectonics to other species of mammals, but differs in morphometric parameters.…”

Section: Source: Author's Developmentmentioning

confidence: 99%

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2023

Ukrainian journal of veterinary sciences

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Section: Source: Author's Developmentmentioning

confidence: 99%

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2023

Ukrainian journal of veterinary sciences

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Peculiarities of organometry and morphoarchitectonics of the heart of the Domestic ram (Ovis aries L., 1758)

Horalskyi,

Ragulya,

Kolesnik

et al. 2023

Ukrainian journal of veterinary sciences

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Today, cardiovascular diseases are the dominant diseases of animals, which most often lead to their death both in Ukraine and worldwide. Therefore, morphological studies of the heart at the cellular, tissue, and organ levels are essential in clinical cardiology for in vivo ultrasound diagnosis of functional and organic heart lesions. The aim of the study was to perform a histological and cytomorphometric assessment of the morphological structures of the sheep heart using macroscopic, histological, and morphometric methods. Using morphological methods, the hearts of sexually mature clinically healthy animals (n=5) belonging to the class Mammalia – Mammals, species Ovis aries L., 1758 – domestic sheep (ram) were studied. The absolute and relative heart weights of mature sheep were determined, which are, respectively, 208.4±9.82 g and 0.44±0.007%, and the weight without epicardial fat is 175.0±8.17 g. The heart of sheep, according to the development index (145.5±4.02%), belongs to the expanded-shortened anatomical type. The most developed components are the ventricles. At the same time, the ratio of the mass of the heart ventricles to its net mass is 1:0.78, respectively, the ratio of the mass of the atria is 1:0.22, and the ratio of the mass of the atrial myocardium to the mass of the ventricular myocardium is 1:0.29. The largest volume was found in the cardiomyocytes of the left ventricle – 3982.99±423.96 μm3 , the smaller – in the right ventricle – 2463.02±318.04 μm3 and the smallest – in the atrial cardiomyocytes – 1215.93±176.94 μm3 . The volumes of cardiomyocyte nuclei in the left (53.42±5.18 μm3 ), right (52.85±4.33 μm3 ) ventricles and atria (50.16±4.57 μm3 ) were almost identical. Nuclear-cytoplasmic ratio was the lowest in cardiomyocytes of the left ventricle – 0.0136±0.0062, slightly higher in cardiomyocytes of the right ventricle – 0.0219±0.0079 and the highest – 0.0430±0.0096 in atrial cardiomyocytes. The obtained results on the macroand microscopic structure of the heart of bighorn sheep (Ovis aries L., 1758) complement the information on the morphology of the sheep heart in the relevant sections of histology and comparative anatomy and are necessary for clinical cardiology

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Pesquisa com animais e a cirurgia cardiovascular

Cited by 2 publications

References 1 publication

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Peculiarities of organometry and morphoarchitectonics of the heart of the Domestic ram (Ovis aries L., 1758)

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