SU849581A1 - Device for revealing cardiac arrhythmia - Google Patents

Abstract

A device for detecting cardiac arrhythmias, containing a filling clock generator, a node measuring the difference in duration of dvzos of adjacent RR intervals, consisting of a reversible counter and a binary counter of RR intervals, a comparison node, a dynamic control set node consisting of sequentially connected frequency divider and a binary counter , a binary counter for the number of arrhythmias and a control node, characterized in that, in order to increase the reliability of the detection of arrhythmias, a register has been entered into it, the test clock pulse, the monitor RR shaper, the result preliminary analysis block and the error indicator, the register input is connected to the output / binary counter of RR intervals and the first input of the reversing counter, the register output is connected to the second input of the reversible counter, clock pulse generator output check connections to the output of the generator of the clock pulses of the filling, to the inputs of the dynamic control setpoint node, the control node, the binary counter of the RR intervals and the third input One reversible counter, the output of which is connected to the first input of the comparison node, the second input of which is connected to the output of the dynamic control setpoint, the input of the preliminary result analysis unit is connected to the output of the comparison node, and the outputs are connected to the binary counter of the number of arrhythmias and the fault indicator, and the output of the control interval RR generator is connected to the second input of the control unit.

Description

FIELD OF THE INVENTION The invention relates to medical equipment, in particular to diagnostic cardiological devices.

A device for detecting cardiac arrhythmias is known, containing a node measuring the difference in the duration of two adjacent RR intervals, a comparison node, a constant monitoring setpoint node.

This device is characterized by a low efficiency of arrhythmia detection both in functional stress tests and in rest conditions for steady-state and transient processes, which is determined by the presence of an invariant test set-up.

More perfect is a device for detecting cardiac arymia, which contains a filling clock pulse generator, a node measuring the difference of the duration of two adjacent RR intervals, consisting of a reversible counter and a binary counter of RR intervals, a comparison node, a dynamic control set node, which consists of a binary a counter and a clock frequency divider, a count of arrhythmias and a control node are binary.

The known device allows arrhythmias to be detected both in transitional mode and in statics. However, the device does not provide for the possibility of controlling the correctness of its operation, which reduces the reliability of the Obtained information and makes it difficult to diagnose.

The aim of the invention is to increase the availability of arrhythmias. .

The goal is achieved by the fact that in a device containing a filling clock pulse generator, a node measuring the difference of the duration of two adjacent RR intervals, consisting of a reversible counter and a binary counter of RR intervals, a comparison node, a dynamic control set node consisting of serially connected frequency dividers and a binary counter, a binary counter for the number of arrhythmias and a control node, a register is entered, a test clock generator, a checker generator RR, bl to

Preliminary analysis of results and a failed indicator, the register input being connected to the binary counter output of RR intervals and the first input of the reversing counter, the register code connected to the second input of the reversible counter meter, the output of the test clock generator, connected to the inputs of the clock pulse generator. dynamic control setpoint node, control node, binary counter of RR intervals and the third input of the reversible counter, output

which is connected to the first input of the comparison node, the second input of which is connected to the output of the node, the dynamic control setpoint, the input of the preliminary analysis unit of the result is connected to the output of the comparison node, and the outputs are connected respectively to the binary counter of the number of arrhythmias and the fault indicator, and the output of the control interval generator The RR is connected to the second input of the control node.

FIG. 1 shows a block diagram of a device for detecting cardiac arrhythmias; in fig. 2 - time diagrams of the device;

in fig. 3 - block diagram of the preliminary analysis of the result.

The device contains a generator 1 clock filling pulses, node

measurement of the difference in the duration of two adjacent intervals RR (uRR), consisting of a reversible counter 2, a binary counter 3 determining the duration of the interval RR, register 4, a comparison node 5, a dynamic control set node which consists of a binary counter 6. and a divisor 7 clock frequency, result analysis block 8, fault indicator 9, arrhythmia number binary counter 10, test clock pulse generator 11, control interval RR, control node 13.

The oscillation clock of the oscillation clock 1 is connected to the first output of the control unit 13, to the input of the frequency divider 7, to the input of the binary counter 3 of the RR interval, to the third input of the reversible counter 2. The second input of the control unit 13 receives the electrocardiogram. This one. 5 tions of device health monitoring .. The short-circuit command sets binary counter 3 and 6 .. to О. With the arrival of the K4 command, the generator is turned on. 11 test clock pulses, generating a TI test with a frequency N times the frequency of the TI fill. On the reversible counter 2, a test value & RR is formed by subtracting the RR interval of the previous cardio count from the entered value: the check TI until the control conditioner 12 of the control interval RR does not raise the control SI. The number N is chosen in such a way that the number between the K4 command and the control SI fits in the number. TEST (RR check), which provides, as a result of a comparison of the content of the reversible counter 2 and the binary counter 6, revealing of the test arrhythmia. In this case, it is necessary to proceed from the minimum value of 2 values of the real interval KR recorded in the reversible counter so that, when checking the inequality RR; -, 0,2 RR ;, always performed. After the occurrence of the control CI, the control unit 13 generates commands for the K1p check comparison (Fig. 2). At the command K5, the result of the heartbeat rhythm analysis cycle is examined, taking into account the result of the device operability test, for the detection of cardiac arrhythmias and devices being prepared for the next operation cycle (reset, set to O) Binary counters 3,6, the reversible counter 2 is entered with register 1, register 4, corresponding to 6, the duration of the RR interval of the preceding cardiocycle). The preliminary analysis of the result 8 (Fig. 3) generates a malfunction signal if the verification arrhythmias are not detected (thus, the result of the analysis of the rhythm of cardiac activity on the binary counter 10 is prohibited) and permits the passage of the result of the analysis of the rhythm of cardiac activity on the binary counter 10 in the event of a test arrhythmia. Trigger T1 (Figs. 2 and 3) is switched over the counting input by command K1. The result of the first (main) comparison is recorded in the T2 trigger, and the result of the second (verification) comparison is recorded in the TK trigger. By the command K5, the addition of the content trigger T2 to the contents of the binary counter 10 is allowed if the trigger TZ is in state 1 (the test arrhythmia is detected). If a test arrhythmia is not detected (the TK trigger is in the O state) on the command K5 a failure signal appears, the trigger output, T2 is blocked. The number of heart rhythm disturbances is counted by a binary counter 10 times the number of arrhythmias. Thus, by automatically monitoring the correct operation of the device for cardiac arrhythmia, carried out after each cycle of heart rhythm analysis, the reliability of the information obtained using the device is increased. The device can be used to diagnose cardiac arrhythmias in conditions of normal human vital activity, for intensive monitoring of patients in an intensive care unit, ambulance, in outpatient practice, during stress tests, as well as for monitoring a person in extreme conditions (aviation, space, sports medicine). the same input is connected to the output of the imaging unit 12 of the control interval RR The outputs of the control unit 13 are connected to the command inputs of the respective blocks. The output of the divider 7 of the frequency of the dynamic setpoint node is connected to the input of the binary counter 6, the output of which is connected to the second input of the node 5 of the comparison. The output of the binary counter 3 intervals RR is connected to the input of the register A and with the first input of the reversible counter 2, the output of the register 4 is connected to the second input of the reversible counter 2, the output of the last connected to the first input of the comparison node 5. The output of the comparison node 5 is connected to the input of the preliminary analysis unit 8 of the result, the first output of the latter is connected to the input of the LED 9, the second output is connected to the input. the binary counter 10 of the number of arrhythmias. The output of the generator 11 test clock pulses is connected in parallel with the output of the generator 1 of the clock pulses of the filling. The electrocardiogram (ECS) is fed to the input of control unit 13, which for each tooth R EX creates sync pulses (SI) and executes commands controlling the operation of the device, as well as phasing SI with clock pulses (TI) received at control node 13 (Fig. 1 and Fig. 2), the filling TIs continuously fill each RR interval. The following operations are performed on the pulses of the K1-K6 commands: K1-comparison operation; K2-overwriting the contents of the binary counter 3 in the register 4 and the reversible counter 2; KZ-reset (installation in O) binary counters 3 and 6; K4-start of the generator 11 clock test pulses, resolution of the control unit K1p to the control unit 13, feed to the input of the control unit 13 from the generator 12 of the control interval RR CI, the distance to which ensures the detection of the test arrhythmia; KZ-overwrites the contents of the register 4 in the reversible counter 2, reset (set in O) binary counters 3, 6, the analysis of heart rate; KB-cast .block 8 preliminary analysis of the result to its original state. Commands for controlling the operation of the device for detecting cardiac arrhythmias K.1-K6 are formed in the interval between the first and second TI of filling each cardiac cycle, which ensures the continuous operation of the device. (Fig. 2). The number of TIs filled between two adjacent SIs is counted by binary counter 3 and binary counter 6, with a frequency divider 7 connected to the input of counter 6, with a division factor of 5. 1. Thus, binary counter 3 contains the value corresponding to the duration of the RR interval, and as a result dividing the frequency of TI filling in binary counter 6 is a number corresponding to 1.3 RR 0.2 RR. On r. Reverse counter 2, we have the difference of the values of the previous and subsequent RR intervals, obtained by entering the previous cycle on the K2 command from the binary counter 3 of the previous RRj interval and subtracting the subsequent RR interval: ,,, directly on the reversing counter 2, used as a subtractive device: i RR j - RR - RR.1 On the command K1 supplied from the output of the control unit 12 to the input of the comparison unit 5, the mean value of uRR is carried out; with a continuously variable reference value (reference setting) of 0.2, the URR inequality is 0.2 RR; Comparison node 5 produces a pulse corresponding to the presence of cardiac arrhythmias; The result of the comparison is recorded by the unit 8 of a preliminary analysis of the result. The K2 command controls the rewriting of the value corresponding to the duration of the RR interval from binary counter 3 to the reversible counter 2 and to the register 4. The latter is necessary for further operation

Claims (1)

A device for detecting cardiac arrhythmias, containing a clock fill pulse generator, a unit for measuring the difference in duration of two adjacent intervals RR, consisting of a reversible counter and a binary counter of intervals RR, a comparison unit, a dynamic control setpoint unit, consisting of a frequency divider and a binary counter connected in series. ka, a binary counter of the number of arrhythmias and a control unit, characterized in that, in order to increase the reliability of detecting arrhythmias, a register, a clock generator of checks, a shaper of the control interval RR, a block of preliminary analysis of the result and a failure indicator are entered into it, and the register input is connected to the output of the binary counter of intervals RR and the first input of the reversible counter, the output of the register is connected to the second input of the reversible counter, the output of the check clock generator is connected to the output clock generator of filling ', to the inputs of unit dynamic control setpoint, control node, _of a binary counter and RR intervals tretemu® entry down counter vyhodI # which is connected to the first node comparing vhoduI *, the second input of which | ζ connected to the output node of the dynamic control the settings, the input of the block for preliminary analysis of the result is connected to the output of the comparison node, and the outputs are connected respectively to the binary counter of the number of arrhythmias and the failure indicator, and the output of the control driver ervala RR is connected to the second input of the control unit. 3> 849 581 2