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

• US 4,593,702 A
• Filed: 10/18/1982
• Issued: 06/10/1986
• Est. Priority Date: 10/22/1981
• Status: Expired due to Fees

• Current Assignee: Osrodek Badawczo-Rozwojowy Techniki Medycznej "Ormed", Warszawa, Ul.
• Original Assignee: Osrodek Badawczo-Rozwojowy Techniki Medycznej "Ormed"
• Inventors: Walczak, Franciszek, Kepski, Roman, Piatkowski, Adam, Plucinski, Zbigniew
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/434,903
• Time in Patent Office: 1,331 Days
• Field of Search: 128/696-697, 128/699, 128/700, 128/709
• US Class Current: 600/509
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/308 for electrocardiography [ECG]
• CPC Class Codes: A61B 5/341 Vectorcardiography [VCG]
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal

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.

Claims

1. 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.

2. The system of claim 1, in which each pair of electrodes is adapted to be positioned on the body so that a line connecting the upper electrode and the lower electrode of each electrode pair is parallel to the longitudinal axis of the heart.

3. The system of claim 1, in which the upper and lower electrode of each pair are adapted to be located on the body in a spatial pattern around the torso surface, whereby HIS-Purkinje system electrical activation potential is measured.

4. The system of claim 1, in which each amplifying means comprises several amplifiers electrically connected in parallel.

5. The system of claim 1, in which the upper and lower electrodes of the electrode pairs are located on a patient'"'"'s chest and back along extended lines of geometrical projection of the conduction system of the heart onto the patient'"'"'s torso surface.

6. The system of claim 5, in which the upper electrodes are adapted to be located at the level of the first intercostal space and the lower electrodes are adapted to be located at the level of the lower part of the HIS-Purkinje system.

7. The system of claim 6, in which the lower electrodes are located at a level close to the tip of the heart.