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Excitation of the cardiac muscle of rats irradiated by X-rays


, : Excitation of the cardiac muscle of rats irradiated by X-rays. Vest Mosk Univ Ser Biol Pochvovedeniya Geol I Geog 2: 81-88

Rats were given 200-1000 and then narcotized for 6 to 10 minutes and given artificial respiration. A monophasic electrocardiogram was taken with the contacts joined to the injured base of the left side of the stomach and the left foreleg. From the first hours after irradiation with a dose 1000, the duration of the excitation increased continuously over the whole period of the effect of irradiation. After irradiation with 500, the prolongation of period of excitation occurred in 2 stages during the next 1 to 7 and 13 to 14 days. After irradiation with 200, the period of excitation alternately increased and decreased around the normal level during the first 14 days. The refractory period, needed by the cardiac tissue to return to the initial level of polarization, decreased during the first hours after irradiation with doses ranging from 200 to 1000. These symptoms later increased continuously in those animals that had received 1000, while in those that had received 500 and 200 they alternately increased and decreased. The observed changes were a consequence of both direct and indirect X-raying of the heart.

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Other references

Maurer, W.; Locher, G.W., 1972: Lympangioma of the pancreatic head. Helvetica Chirurgica Acta 39(5): 801-807

Schouten, A.A., 1975: An investigation into regional differences in thickness in the head endoderm of mouse embryos, ranging from 8 to 9 days gestational age. Acta Morphologica Neerlando-Scandinavica 13(1-2): 102-103

Heilmann, A., 1950: The provenance question and seed supplies of north-west American tree species, with special reference to Douglas Fir.. The author, who spent some months in 1949-50 in the Pacific Northwest, with the aim of finding suitable sources and establishing a guaranteed supply of Douglas Fir seed for importation into Denmark, examines such data as are available on the clima...

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Richardson, K.; Parker, C.D., 1985: Identification and occurrence of Vibrio cholerae flagellar core proteins in isolated outer membrane. Sodium dodecyl sulfate-urea polyacrylamide gel electrophoresis of outer membranes from a flagellated and an isogenic nonflagellated strain of Vibrio cholerae (classical, Inaba) suggested that two proteins were absent from the nonflagellated strain...

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Tremble, E.; Hutchison, K., 1926: A Survey of Post-Graduate Teaching in Oto-Laryngology in Certain European Centres. Canadian Medical Association Journal 16(2): 200-202

Liu-Xiaoming; Gao-Shan; Diwu-Chunrong; Yuan-Honglin; Hu-Zhaochu, 2007: Simultaneous in-situ determination of U-Pb age and trace elements in zircon by LA-ICP-MS in 20 mu m spot size. Simultaneous in-situ determination of U-Pb ages and 20 trace elements of three international zircon standards (91500, GJ1 and TEMORA 1) and one laboratory zircon standard (SK10-2) separated from Cenozoic fine-grained gabbro was carried out on qua...

Fong, K.Y.; Chang, C.M.; Ma, H.T.; Yu, Y.L., 1992: Thoracic aortic aneurysm presenting as paraparesis: a case report. Neurology 42(7): 1419-1421

Mabesa, L.; Novero, F., 1982: Microwave preheating of fruit and vegetable samples cuts down total time for moisture determination. Philippine agriculturalist 65(2): 195-199