[Parameters of external respiration and systemic hemodynamics in sheep]

Parameters of systemic and intracardial hemodynamics studied in relation to gas exchange and respiratory functions of the blood in sheep under conditions of low altitude and stable nutrition revealed normal oxyhemoglobin in arterial and mixed venous blood and increase of respiration rate with low pulmonary ventilation. Systemic hemodynamics in low altitude sheep involved low pulse pressure due to a high diastolic component occurring because of an increased tone of peripheral vessels. Changes of temporal parameters of systolic periods due to an increased heart rate, are different in the two ventricles.