title: [Changes in circulatory parameters in dogs under general respiratory hypoxia].
abstract: The decrease in the oxygen content of the inspired air calls forth enhanced demands on the cardiocirculatory performance. In experiments on healthy dogs the haemodynamic shifts connected with short-term hypoxia were investigated, with particular attention to the possible presence of irreversible changes in the myocardium. With the aid of radiocardiography the following parameters were investigated before, during and after hypoxic test: blood volume, cardiac output, stroke volume, heart frequency, ejection fraction, mean right-to-left circulation time, and segmental lung volume. In dependence on the degree of hypoxia characteristic changes in the above parameters occurred. After the end of hypoxia most parameters returned to their initial levels. The presence of irreversible changes could not be proved. Under the given conditions, it was possible to test the individual level of cardiocirculatory performance with the aid of hypoxia similarly as by using the exercise test.
mesh_terms: D000818:Animals; D001810:Blood Volume; D002302:Cardiac Output; D004285:Dogs; D006339:Heart Rate; D006439:Hemodynamics; D000860:Hypoxia / Q000000981:diagnostic imaging*; D011652:Pulmonary Circulation; D011877:Radionuclide Imaging; D012711:Serum Albumin, Radio-Iodinated; D013318:Stroke Volume
chemical_list: D012711:Serum Albumin, Radio-Iodinated
vernacular_title: Veränderungen von Kreislaufparametern bei Hunden unter allgemeiner Beatmungshypoxie.