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[Several biophysical parameters of the cardiovascular system in patients with hypertensive disease].

Biophysical assessment of circulation was performed in 135 patients with essential hypertension and 39 healthy subjects at rest and during exercise. An increase in arterial impedance was found to play a major part in the mechanisms of blood pressure elevation. In patients with eukinetic hemodynamics, the markedness of left ventricular hypertrophy was associated with adequate circulatory biophysical mode at rest and with the limitation of adaptive changes during exercise. In patients with hypokinetic hemodynamics, the hypertrophied myocardium adjusts itself to an increased after load at the expense of increments in the left ventricular oxygen demand (even at rest) and the exhaustion of myocardial functional reserve during muscular activity.