title: [Changes in myocardial ultrastructure in geese overfed at different altitudes].
abstract: In the experiments the method of intensive feeding of geese (hybrid Ivages  with steamed maize for a period of 32 days at two different altitudes was used (146 m above sea level and 974 m above sea level). Changes of the ultrastructure of the heart muscle of these animals were investigated. At both levels a marked lipid infiltration of myocardial cells was observed, formation of a large number of myelin-like structures, contractures of myofibril bundles, enhanced lobe formation of nuclei and marked abundance of pinocytic vacuoles in endothelials of capillaries. In geese from the high altitude the extent of fatty infiltration, the number of myelin-like structures and contractures of myofibril bundles was smaller than at the lower altitude. Probably during the more than one-month stay of the geese at the higher altitude as part of adaptation processes a population of "young" smaller mitochondria developed which represented a 10% increment of mitochondria which was confirmed also by morphometric methods.
mesh_terms: D000531:Altitude; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet; D005777:Geese; D009206:Myocardium / Q000648:ultrastructure*
vernacular_title: Zmeny ultrastruktúry myokardu u husí prekrmovaných vodlisných nadmorských výskach.