S. V. Revenko

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The reflex reaction of phrenic sympathetic neurons to stimulation of carotid body chemoreceptors was tested in chloralose-anesthetized and paralyzed cats with both vago-aortic nerves cut. During systemic hypoxia (animals ventilated with 10% O2 in N2) the sympathetic phrenic nerve activity increased from 100% in the control to 269%. This increase was(More)
Multicycle harmonic (Fourier) analysis of bioimpedance was employed to simultaneously assess circulation and neural activity in visceral (rat urinary bladder) and somatic (human finger) organs. The informative value of the first cardiac harmonic of the bladder impedance as an index of bladder circulation is demonstrated. The individual reactions of normal(More)
The indolalkylamine alkaloid yohimbine induced two phenomenologically-different types of sodium current (INa) inhibition in the voltage-clamped frog node of Ranvier, a tonic and a phasic ('use-dependent') block. The latter developed during a repetitive membrane stimulation with short (5 ms) depolarizing pulses at frequencies at 1 to 10 Hz. Unlike repetitive(More)
Blood supply to the pelvic organs of outbred male rats was diminished by graduated constriction of the distal part of the inferior vena cava. Deficiency of intramural blood supply in prostate and urinary bladder was revealed by bioimpedance harmonic analysis according to the magnitude of first cardiac peak in the bioimpedance spectrogram. In 1–1.5 months,(More)
Fourier analysis was employed to determine the amplitudes of spectrum components of small variations of electrical resistance (bioimpedance) in human fi nger recorded using an original hardware-software complex. It revealed periodic bioimpedance oscillations at the frequencies of heartbeats, respiration, and Mayer wave (0.1 Hz). These periodic variations(More)
High-resolution impedancometry and harmonic (Fourier) analysis of variable component of bioimpedance revealed rhythmic oscillations of urinary bladder bioimpedance at the Mayer wave, respiration, and heartbeat frequencies. The power values of the corresponding Mayer, respiratory, and cardiac peaks were calculated to assess circulation in the urinary bladder(More)