[Systemic and cerebral hemodynamic status of flight personnel under moderate hypoxia]

For the purposes of medical expertise the state of systemic and cerebral hemodynamics has been investigated in 66 pilots with autonomic-vascular instability and in 36 healthy subjects exposed to moderate hypoxia (in an altitude chamber). The pilots have shown noticeable tachycardia or systolic hypertension as well as certain changes in cardiac output and stroke volume. These alterations have been accompanied by rheoencephalographic changes of two types one of which can be regarded as an adverse response of cerebral circulation to hypoxia. It is concluded that the study of systemic and cerebral circulation in hypoxia yields an important diagnostic information that allows better expertise estimates.