Katkov V E, Chestukhin V V, Zybin O Kh, Mikhaĭlov V M, Troshin A Z
Kosm Biol Aviakosm Med. 1979 May-Jun;13(3):62-7.
Before and after 5-day head-down tilting (-4.5 degrees) blood pressure was measured in different cardiovascular compartments by the technique of selective catheterization: the upper bulb of the internal jugular vein, superior and inferior venae cavae, hepatic, renal and iliac veins, right atrium and right ventricle, coronary sinus, pulmonary and radial arteries. After exposure the pressure in extrathoracic vessels increased by 1.4 mm Hg on the average: in the internal jugular vein it rose by 1.7 mm Hg whereas in the iliac vein by 1.0 mm Hg. The blood pressure in the intrathoracic vessels of the systemic circulation increased, as a rule, by no more than 0.5--0.8 mm Hg. This elevation was characteristic of diastolic regions of the pressure curve (x- and y-collapse). The pressure in pulmonary vessels--pulmonary artery and left atrium--showed a trend for a decrease of 1.3 mm Hg. The factors that may be responsible for the dissimilar changes of pressure in different cardiovascular compartments under the influence of short-term simulated weightlessness are discussed.
在头低位倾斜（-4.5度）5天前后，通过选择性导管插入技术测量不同心血管腔室的血压：颈内静脉上球部、上腔静脉和下腔静脉、肝静脉、肾静脉和髂静脉、右心房和右心室、冠状窦、肺动脉和桡动脉。暴露后，胸外血管的压力平均升高1.4毫米汞柱：颈内静脉升高1.7毫米汞柱，而髂静脉升高1.0毫米汞柱。体循环胸内血管的血压通常升高不超过0.5 - 0.8毫米汞柱。这种升高是压力曲线舒张期区域（x和y塌陷）的特征。肺血管（肺动脉和左心房）的压力呈下降趋势，下降了1.3毫米汞柱。讨论了在短期模拟失重影响下不同心血管腔室压力出现不同变化的可能原因。
