Biomedical subjects
Publications and source records attributed to M Grzybiak.
In studies conducted on material comprising 209 individuals of both sexes at the age of 20 weeks to 90 years, five cases were found with atypical course of renal and gonadal vessels along with developmental anomalies of the kidneys and ureters. In three individuals with these anomalies of vessels and ureters some accompanying complicated organic heart diseases were also detected.
An investigation was carried out of 100 human male individuals at the age of 20 hbd to 28 hbd and of 18 to 90 years. Attention was paid to the fact whether these blood vessels commenced in the aorta or renal artery, to the relation of testicular arteries to the trunk of vena cava inverior, and to their course vis a vis that of the renal veins. Four most common variations in the course of these vessels were identified, and variations in their basic types seen in our material were described.
Research was conducted on material consisting of 180 fetal, newborn, infant, and adult hearts of various ages. Upon opening of the left ventricle the frequency of occurrence as well as the morphology of the false tendons were examined in this heart chamber. Special attention was paid to false tendons running through the ventricular lumen. It was determined that these elements occur with similar frequency, accounting for about 40% of hearts, in all examined age groups. In fetal hearts, the greatest number of false tendons in the ventricular lumen ran between the interventricular septum and the exterior ventricular wall, finding its attachment generally just below the base of the papillary muscle. In newborn, infant and adult hearts the greatest number of false tendons connected the interventricular septum with the posterior papillary muscle.
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A new model of the atrioventricular junction was developed by Anderson et al, of which each element has clinical significance and requires more specific research into its morphology and topography. Observations were carried out on materials consisting of 200 human hearts of both sexes of various ages (from 16 weeks of fetal life to 97 years of age). Histological slides were stained by Masson's method in Goldner's modification. It was concluded that the atrioventricular node consisted of two layers in all groups of examined hearts: cells of the compact area and transitional cells. With age, these cells change their morphology, especially in the transitional layer. Morphologically, within the atrioventricular bundle were differentiated. The topography of the atrioventricular node is dependent on the age of the examined heart. As much as in human adults it is found entirely within the triangle of Koch, in fetal and children's hearts its elements of its left branch were found in the false chordae tendinae of the left ventricle. The above observations suggest that in the case of younger hearts the triangle of Koch does not represent an absolute margination for the elements of the conductive system of the heart, which in the case of cardiac surgical procedures and ablations can in some percent, be the cause of iatrogenic complications.
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