DEVICE FOR EVALUATING FUNCTIONAL STATE OF THE CARDIOVASCULAR SYSTEM Russian patent published in 1999 - IPC

FIELD: medical engineering. SUBSTANCE: device has electrodes for reading biopotential values from patient chest, electrodes for reading biopotential values from patient extremities, multichannel amplifier of biopotentials, low frequency filter unit, as well as multiplexor, analog-to-digital converter, processor unit and recording unit connected in series. The first and the second oscillators creating synchronous probing current pulse bursts, the first and the second electrodes for delivering probing current to patient upper extremities, the first and the second electrodes for delivering probing current to patient lower extremities, the first and the second differential amplifiers of alternating current, adder, detector, low frequency filter and band-pass filter. Synchronous probing current pulse bursts succession period is at least 10 times as much as synchronous probing current pulse bursts duration, pulse frequencies being equal to (10-100).10³. EFFECT: concurrently recorded electrocardiogram and integral rheogram of human body. 3 cl, 2 dwg