SU520975A1 - Ecg analyzer - Google Patents

Description

(S4) ECG ANALYZER

- The invention relates to medical technology,

i, namely, devices for analyzing rokle cardogram.

A device for automatic ECG analysis is known, comprising an ECG amplifier, a P-s-teaser extractor, an Amsterdam memory unit, a logic circuit, and a signaling system.

. This lie device provides automatic determination of the location of the distal end of the cardiac electrode according to the shape of the intraventricular ECG signal, which delays the analysis time. :

-., ".., ..

In order to automatically determine the location of the distal end of the endocardial electrode according to the shape of the intracavitary ECG signal, the proposed 15: analyzer has an intracavitary ECG amplifier, an intracavitary ECG teeth selector, an intracavitary ECG amplitude measurement unit, an intracavitary electrocardiogram amplification unit, a pulse generator, an impulse identification module, and an IGG identifier, a unit for identifying the ECG teeth, and an IGG pattern, the generator of the amplitudes of the intracavitary ECG - 20 liters P - teeth, amplitude discriminator B - teeth, amplitude discriminator-iP - teeth, and amplitude ratio discriminator. ECG amplifier, P-wave extractor, gate driver of gating pulses of this analyzer are connected to a sequence gS

however, the output of the intracavitary ECG amplifier of a state with the inputs of the amplitude measurement unit of the intracavitary ECG teeth and the intracavitary ECG teeth selector, the output of which is connected to the inputs of the amplitude measurement unit of the internal ECG teeth and the identification unit of the ECG teeth, the other input is connected to the output of the hammer forming impulses , the outputs of the ECG teeth identification block are connected to the inputs of the blocks for storing the amplitudes of the P and R teeth. The other inputs of these blocks are connected; the output from the output of the amplitude measurement unit of the teeth of the intracavitary ECG, the output of the K-teeth amplitude memory unit is connected to the inputs of the amplitude discriminator S-teeth and ra-iCK of the amplitude ratios, the output of the unit overnoNmnaHHa amplitudes E-teeth connected to the amplitudes, and the output of the block is for noNmnaHHa amplitudes E – teeth connected to the amplitudes The amplitude co-ordinator and discriminator of amplitudes of P-teeth, the discriminator outputs of the ratio of amplitudes and amplitudes of P and-teeth are connected to the inputs of the logic circuit, and its inputs to the inputs of the signaling circuit.

FIG. 1 shows a block diagram of an ECG analyzer; in fig. 2 - voltage plots showing the operation of the analyzer.

The ECG analyzer contains the accumulator 1 intracavitary ECG, the output of which is connected to the inputs of the measurement unit 2 of the teeth amplitude of the intracavitary ECG and the selector 3 teeth of the intracavitary ECG, the output of the afterglow is connected to the inputs of the measurement unit 2 of the intracavitary ECG and identification unit 4 EKG teeth. Amplifier 5 ECG, extractor 6 P - teeth and shaper 7 gating impulses are connected in series. The output of the imaging unit 7 is connected to the second input of the JQ identification block 4 of the ECG teeth, and the outputs of the block 4 are connected to the passages of the block 8 for storing the amplitudes of the P-teeth and

block 9 memorizing amllite P - teeth. Other inputs of blocks 8 and 9 are connected to the output of block 2 for measuring the amplitudes of the teeth of the intracavitary ECG. The inputs of the discriminator 10 amplitudes R - teeth and discriminator 11 amplitude ratios are connected to the output of the amplitude storage unit 8, teeth. The input of the discriminator 12 amplitudes of the P-teeth and the input of the discriminator 11 are connected to the output of the 9-to-1 block and 1 "of the amplitudes of the P-teeth, the outputs of the discriminator 10, 11, 12 are connected to the inputs of the logic circuit 13, the outputs of which are connected to the inputs of the signaling circuit 14 .

The analyzer works as follows. Electrocardiographic signals from the endocardial electrode, the location of which is to be monitored, and from the surface electrodes fixed on the surface of the patient’s body, are fed to the intracavitary ECG amplifier 1 and the PA-force amplifier

Body 5 ECG. From the output of the ECG amplifier 5, the signal (Fig. 2a) is fed to a 6 P puller, a wave at the output of which pulses are formed, corresponding to the P wave of an ECG. Next, the pulses corresponding to the P wave, arrive at the shaper 7 gating 35 pulses. At the output of the latter, pulses are formed (Fig. 26), whose duration by several tens of milliseconds exceeds the duration of the electrical system.

Electrocardiographic signal (Fig. 2c) 40

from the output of the amplifier 1 intracavitary ECG enters the inputs of the unit 2 measuring the amplitudes of the teeth of the intracavitary ECG and the selector 3 teeth of the intracavitary ECG. The selector of 3 teeth of the intracavitary ECG generates pulses (Fig. 2d) with a duration of 90 ms, 45 if the steepness of the signal of the intracavitary EC1 exceeds: a certain level, for example, J5 mV / sec. The amplitude measurement unit 3 of the teeth of the intracavitary ECG consists of full-wave and peak detectors and a signal is formed at its output (Fig. 2g), corresponding to the maximum amplitude of the next ECG wave. Bounce; From the peak detector, the back of the pulse from the output of the selector 3 teeth of the intracavitary ECG is performed.

Signals from the outputs of the selector 3 of the teeth of the intracavitary ECG (Fig. 2d) and the gating device 7 of the gating pulses (Fig. 26) are received on the side 4 of the identification of the ECG teeth. If after formirovani. pulse at the output of the selector 3 teeth intracavitary ECG for 70 washes will not be formed 60

the output signal of the gating pulse shaper, then the specified pulse corresponds to the P wave of the intracavitary ECG and the ECG teeth identification block 4 will be generated by a pulse less than Yumsek (Fig. 2e), which will be received by the B POD of the 9 teeth amplitude memorizing unit. In block 9, memorization of a significant value occurs (w) from the output of block 2, the aml; 1 pin of teeth of an intracardiogram ECG arriving at the other input of block 9 of the amplitude memory P - teeth.

If the pulse at the output of the selector 3 teeth of the BN triplex ECG will be formed no later than 30 ms after the formation of a signal at the output of the gate generator 7 gating pulses (or the output signal of the generator of the 7 gating pulses will be generated no later than 70 ms after the appearance of pulses at the output of the selector 3 teeth of the intracribal cavity ECG) the indicated impulse corresponds to CX SS - complex and at the other output of block 4 identifying 1 and the ECG teeth an impulse will be formed (Fig. 2e), the end point of which the sovggad With the moment of the end of the pulse at the output of the selector 3 of the teeth of the intracavitary ECG and which goes to the amp-8 input block; p1-B teeth, where the values of the voltage input to the second O-Ioica 8 teeth amplitude S memorized from the output of the 2 kzmorsnin amplitude teeth intracavitary ECG.

{gels pulse at the output of the selector 3 ZuOtson .. vnut) I1 The ECG void will be formed later than 70 MceR after the signal at the output of the shaper 7 gating pulse appears, then the specified pulse corresponds to the same temperature, forming the pulses at the outputs of the unit and unification of the teeth ECG HI will occur.

Location: pdocardial) LSC1 of type is determined depending on the values of Amiitiud Ri of the teeth of the ECG, as well as their ratio, and the signals corresponding to the amplitudes of Ri of Rd teeth come from the outputs of the Glitch 8 memory of amplitudes B – teeth and block 9 of amlli memory P - teeth lia inputs of the discriminator tO amplitudes of K - teeth, discriminator 11 ratios of Amscht and discriminator 2 amplitudes of P - teeth, and signals from their inputs go to logic circuit 13.

The signal at the output of the 10-amplitude impulse S-teeth disk is generated if the amplitude of the Q-KS complex of the intracavitary ECG exceeds 3. 5 m sgnshn at the output of the discriminator amplitude ratio occurs if the ratio of a. Amplitude P wave to amachuda R - wave exceeds 0, 36; and the signal at the output of the discriminator 12 A.ch.plitudyy P - teeth is formed, if the amplitude of the P - wave exceeds 1.2 mV.

Claims (1)

If the amplitude of the P-wave exceeds 2 ppm; and the ratio of the amplitudes of the P-wave to the amll tuds of the R-wave exceeds 0.36, then a signal is generated at the output of logic circuit 13, indicating that the endocardial electrode is in the atrialia,: which enters the input of the signaling circuit 14, if the amplitude B - the tooth is greater than 3.5 mV, and the ratio of the amplitude of the P wave to the amplitude of the S wave is less than 0.36, then the input to the stylization scheme is a signal that the endocardial electrode is in the ventricle. If the amplitude of the S-wave is less than 3.5 mV, and the amplitude of the P-wave is less than 1.2 mV, then a signal is received at the input of the cryptography pattern that the endocardial electrode is in a vein or artery. The alarm unit 14, in accordance with the incoming aa-nal meters from the output of the logic circuit 13, provides a light signaling that the distal end of the eachocardial electrode pacno.iia is in the ventricle, in the atrium or vessel, which facilitates the work of the staff and reduces the time of entry endocardial electrode - in the cavity of the heart. An EKG analyzer containing an EKG amplifier, a P-teeth extractor, an R-teeth amplitude memory unit, a logging circuit and a signaling circuit, characterized in that, for automayury locating the distal end of the endocardial electrode according to the intragastric ECG signal, it has an intracavitary ECG amplifier, a selector of the teeth of an intracolumn ECG, a unit for measuring the amplitudes of the teeth of the intracavitary ECG, a driver for gating them; pulses, an ECG teeth identification block, a memory block a shlity P - teeth. A discriminator of amplitudes of R - teeth, a discriminator of amplitudes of P - teeth and a discriminator of amplitude ratios, an ECG amplifier, an extractor of P - teeth, a shaper of gating pulses connected in series, an output of the amplifier of the intracavitary ECG, in the same time, I had to go to the control panel, I went to the control panel, I went into the loop, I went to) I went to be using the IGH, I went to myself) I went to I have myself going to go to I-18, I’m going to go to I-IG, I went to myself) I went to I have I’m going to I am using I have myself I’m going to use I have I have I’m going to I have myself I’m going to be , the output of which is connected to the inputs of the measuring unit of the amplitudes of the teeth of the intracavitary ECG and the identification unit of the teeth of the ECG, the other input of which is connected to the output of the shapes tel strobe pulses unit outputs identification ECG teeth connected to the inputs of the blocks storing the amplitudes P and R-teeth; other inputs of these blocks are connected to the output of the amplitude measurement unit of the teeth of the intracavitary ECG; P-teeth, discriminator outputs of the ratio of the amplitudes and amplitudes of the P and T waves are connected to the inputs of the logic circuit, and the outputs to the inputs of the signaling circuit.