US 4,593,702 AGranted

Measuring system for the electrical activity of the heart conducting system on the beat-to-beat basis by a noninvasive method

AssigneeOsrodek Badawczo-Rozwojowy Techniki Medycznej "Ormed"

InventorsRoman Kepski, Franciszek Walczak, Zbigniew Plucinski, Adam Piatkowski

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Abstract

The subject of the invention is a measuring system of the heart-conduction system on the beat-to-beat basis by a noninvasive method. It relates to electrophysiological measurements, especially the measurement of very weak voltages of the surface of patient's chest, representing the activation of a specialistic heart-conduction system. The measuring system according to the invention consists of a large number of pairs of measuring electrodes situated preferably along the line of geometrical projections of the heart-conduction system onto the surface of patient's chest and these pairs of electrodes co-operate with a large number of parallely connected amplifying elements, forming together with them parallel amplifying tracks wherefrom summed up voltage is characterized by a signal increase proportionally to the number of the said tracks and by noise increased proportionally to the square root from the number of the said tracks--due to which the signal-to-noise ratio is improved and then the signal is fed to analog and/or digital filtration.

Claims7

Dependent claims

A system for measuring electrical activity of a heart conduction system in a patient's body from excitation to excitation during a single beat of the heart by a noninvasive method, comprising:

at least two parallel channels, each channel defining a measuring track having a pair of electrodes, an upper electrode of said pair adapted to be located on the body not lower than the auricle level of the heart and a lower electrode of said pair adapted to be located on the body no higher than the ventricle level of the heart, means electrically connecting the electrodes of each pair to an amplifying means for producing amplified signals from each pair of electrodes during a heart beat;
an adder means coupled to said amplifying means for summing the amplified signals from said electrode pairs to produce a sum signal;
a filtering means connected to said adder means for filtering the sum signal to produce a filtered signal;
display means connected to said filtering means for displaying the filtered signal;
and
a reference electrode adapted for application to the body, the reference electrode being connected to a common ground for the electrode pairs of each of the measuring tracks.

3 more elements

Dependencies are inferred from the claim text.