SU860746A1 - Instrument for monitoring heart rythm - Google Patents

Description

This is due to her, since reliable detection of the components of the QRS complex from the signal received by the processing unit places high demands on the quality of the transmitting and receiving equipment.

The aim of the invention is to reduce power consumption and increase noise immunity.

The goal is achieved by the fact that in a heart rate monitor device containing an electrocardiogram pickup unit with electrodes and a processing unit including a receiver, a digital processing circuit and an indicator, the electrocardiogram pickup unit is equipped with a series-connected amplifier, R-tooth extraction circuit, pulse shaper, encoder and a transmitter, and the processing unit is equipped with a master frequency reference generator, a frequency divider, a time counting circuit, a processing unit control circuit, an indication control circuit torus and a decoder, the receiver, the decoder and the digital processing circuit are connected in series to the second input of the decoder and to the second input of the digital processing circuit are connected, respectively, the first and second outputs of the frequency divider, the first input of which is connected to the master oscillator of the reference frequency, and the second connected to the first output of the control circuit of the processing unit, the third output of the frequency divider is connected to the first input of the time counting circuit connected by its second input to the second output of the control circuit of the unit The first, second, and third inputs of the indicator control circuit are associated respectively with the output of the time counting circuit, the third output of the control circuit of the processing unit and the output of the digital processing circuit, to the third input of which the fourth output of the control circuit of the processing unit is connected, and the output of the control circuit of the indicator connected to the indicator.

FIG. 1 shows a block diagram of a device for monitoring heart rhythm; in fig. 2-diagrams of signals in various nodes of the block diagram of the electrocardiogram blocking unit.

The device for monitoring the heart rhythm contains an electrocardiogram (EC) pickup unit with electrodes, including an amplifier 1 connected in series, a selection / -jack circuit 2, a pulse shaper 3, an encoder 4, a transmitter 5, and a processing block including a master oscillator 6 frequency, frequency divider 7, time counting circuit 8, processing unit control circuit 9, indicator control circuit 10, receiver 11, decoder 12, digital processing circuit 13, and indicator 14.

The device works as follows.

The ECS, representing co6oi i potential difference between two areas of human skin, formed as a result of depolarization and repolarization of the cardiac mouse, with the help of electrodes is fed to the input of amplifier 1, from which output the amplified signal (Fig. 2 a) K-prong. Circuit 2 is a bandpass filter to isolate the frequency components of the R-wave, as well as a 50 Hz barrier filter to suppress network interference. From the output of circuit 2, the signal (Fig. 26) is fed to the driver of 3 pulses, which

each R-Zubiu arriving at it is formed by a rectangular pulse (Fig. 2c). This pulse triggers the encoder 4, which produces a series of pulses (Fig. 2 d), the duration of which, as well as the time intervals between them, is strictly defined, elena. From the output of the encoder 4 pulses arrive at the transmitter 5, gating it and providing the output signal of the transmitter. A view of this signal is presented.

in fig. 2 (3. This signal is transmitted to the processing unit. The transmitted signal in the processing unit is received by the receiver 11 and, after removal to the required level and demodulation, is sent to the decoder 12,

wherein the received signal is analyzed, and if the pulse duration and the time intervals between them meet the requirements, a single rectangular pulse appears at the output of the decoder 12. The analysis is carried out by comparing the received signal with pulses of a given duration, coming from the frequency divider 7, to the input of which continuously receive pulses.

with master oscillator 6 reference frequency. From the output of the decoder 12 pulse is fed to the circuit 13 of the digital processing. The operation of the circuit 13 is controlled by the circuit 9 of the processing unit, which is associated with the control buttons. In addition, for the synchronization of the operation of the digital processing circuit 13, as well as to ensure the operation of this scheme according to an algorithm, some outputs are used

intermediate stages divider 7 frequency.

In the digital processing circuit 13, a pulse rate is calculated, the arrhythmia is detected based on

measuring intervals between successive pulses from the output of the decoder 12 and analyzing the relationship between two consecutive intervals, classifying cardiac rhythm disturbances and accumulating information from them during a randomly specified period of time.

According to the signal from the processing unit control circuit 9, the pulse frequency, as well as information about heart rhythm disturbances accumulated in the digital processing circuit 13, is outputted via the indicator control circuit 10, also controlled by the processing unit control circuit 9 to the indicator 14. In the absence of a call signal information about the heart rhythm from the digital processing circuit 13 is supplied to the indicator 14, the current time is output to the latter via the indicator control circuit 10, which is determined by the time counting circuit 8 associated with the frequency divider.

The use of the intervals between consecutive teeth of the EKS as a source of information for detecting heart rhythm disturbances can significantly reduce the power consumption of the device to monitor the heart rhythm and ensure its continuous operation from one set of batteries for several months and at the same time significantly improve the noise immunity , which in turn exceeds the reliability of the received information about the state of the cardiovascular system. Due to the fact that the processing unit contains many components of an electronic wristwatch (ENC), it can be performed in the form of an ELF with additional functions of an individual device for intensive control of the heart rhythm. It is used in many areas of human life. Its use allows for a massive cardiological examination of the population and provides for early diagnosis and prevention of cardiovascular diseases.

Claims (2)

1. US patent N ° 3807388, Nki 128-2.05, publ. 1973. 2. US patent No. 3832994, NCI 128-2.1 B, publ. 1974 (prototype). Tg J -Vw A p -lu -Wf ag g