ECG radiomonitoring system

"RADIOHOLTER" combines the advantages of standard Holter monitoring system and bedside ECG monitors and is free from the majority of drawbacks inherent to them.

Continuous electrocardiogram monitoring of a patient, who can freely move around a hospital's territory's, the possibility to obtain a Holter statement without interrupting the observation of the patient, built-in automatic alarm indication of dangerous states - all this gives new quality to investigation.

Continuous radiomonitoring over the state of cardiac rhythm will be useful for patients with complaints on short-term, sporadically appearing disturbances of the heart functioning (when it is impossible to document them with ordinary ECG), for patients with periodically appearing syncopal states, vertigo of unknown genesis, for patients with an artificial pacemaker in order to monitor its functioning, as well as for detection of painless myocardial ischemia with asymptomatic course.

Especially useful this device can be during physical rehabilitation of a patient. The possibility to determine the tolerance to loads during everyday activities of a patient can give to a cardiologist valuable information on the patient's state.

Successful implementation the device is favoured by its exceptionally light weight (135 g) and small dimensions (90 x 58 x 23 mm). A specially designed convenient soft belt does not disturb the patient. Absence of an external antenna makes the device very easy to use. Automatic indication of the battery discharge with transmission of a signal for its replacement makes it possible to carry out investigation over many days. Constant control over the radio contact with messages on its disruption detects the patient going out of the radio visibility zone.

The system can be implemented in a two-console version, when one computer monitors up to 6 patients, and the second one is used for processing the data with any programs (for scientific work in particular) and printing out. It may be useful to connect the system receiver to several computers simultaneously, when, for example, the monitoring is performed in a resuscitation ward and duplicated in a staffroom.

System "RADIOHOLTER" is installed in many clinics and successfully operated for more than three years. The best results are obtained in a postresuscitation period of patient follow-up and when controlling resuscitation measures.

Brief characteristics of the complex
Particularities of registration
  • Real time 1 channel ECG recording
  • 24 houres duration of ECG records
  • Real time Periodogramm
  • Real time visualization of ST position
  • The most interest ECG fragments selection
  • Alarm signal for individual determined heart rate level
  • Automatic Holter heart rate detection
  • Automatic indication of battery discharge and radio contact disturbances
  • Operation system Distance - 0,5 km
  • Urgently printing in shadow regimeе
Data storage
  • Storage of patients' ECGs and data in specialized database
  • The memory compact utilization
  • Archiving of the data on the removable carrier
    The local network
  • Analysis
  • Possibility simultaneous ECG registration and ECG processing
  • Accelerated ECG examination
  • Zone of interested selection for detail study ( using the periodogram, intervalogram, ST position graph, time graph)
  • Compressed observation of ECG
  • Printing
  • 24 hours HR graph, ST position graph, ECG with min and max heart rate, selected ECG illustrates printing with adjustable scaling possibilities
  • Printing standard representation of one channel ECG 40 sec duration

    Basic set of central station
  • Installation floppy disk
  • User's Manual

  • Basic set of terminal unit
  • Preliminary ECG amplifier -transmitter
  • Analog-Digital Converter
  • Patient's cable for disposable electrodes
  • Thoracic rubber band
  • Set of disposable ECG electrodes
  • Software
  • Cross block receiver

  • Now we can offer radiomonitoring system working in 3 channel mode.


    Operating frequency: 65 MHz, but our device (transmitter-receiver) can use any frequency. On your request we can change quartz resonators.
    Maximum indoor range: with distributed receiving antenna up to 200 meters in the worst case - long ferroconcrete building.
    Power source: 4 accumulators AA type, capacity 1000 mA/hours each. This power source provide 30 hours non-stop working.
    Transmitter hasn't special antenna, for this purpose we use electrode leads. Emitted power is about
    3 mW.
    Operating and safety features: total assimilated dose is a lot less then Ukrainian sanitary norms demand. Transmitter hasn't high voltage converters, therefore, it meets 3CF electrical safety standard.+1
    Housing material is plastic. Transmitter size is 110x67x27 mm, receiver size is 250x160x70 mm. We
    are designing new housings for our medical equipment just now, therefore housing sizes can be changed slightly. Transmitter weight is related to accumulators type, in any case it isn't exceed 250 gr.
    Antenna system: transmitter antenna is based on electrode leads. It isn't narrow-band antenna and it hasn't fine adjustment to the frequency. Due to this feature emitted power rests changeless at the time of registration regardless of patient position and doings.
    Receiving antenna is distributed one. It consists of flexible cable, high frequency splitters, quarter-wave aligners and active vibrators. Antenna is very easy-to-use, usually we fit it in the hospital
    corridor on the ceiling.

    Type of software: considering the necessity of high reliability in the continuous mode (our central station isn't turn off over months), we can't allow the multitask mode. Registering PC uses DOS, but it cans submit on-line processed signal to other analyzing PC which can use Windows OS (second PC is the additional option). At once registering PC (central station) provides

    • receiving, processing and visualization of the ECG signal;
    • on-line printing;
    • previous saved files review;
    • audio and light alarm signal according individually specified thresholds (cardiac rhythm rate, asystoly, radio contact divorce, low batteries);
    • displaying of ST-segment displacement, pulse rate, rhythmogram
    • full-screen displaying of one patient ECG recording signal (other ECGs are steel register and alarm signal ready) with possibility of detailed review of this specified ECG (marking, disturbance of cardiac rhythm etc.)

    • OFF-LINE:

    • conventional Holter processing (histogram, scatterogram, automatic maximum and minimum cardiac rhythm rate finding, maximum ST-segment displacement finding etc.;
    • printing of whole report with marked ECG fragments;
    • scrolling of the previous registered ECG with alarms and other processing;
    • all of the on-line functions;
    • off-line mode is possible for any ECG (complete and incomplete record).


    RADIOHOLTER ECGs was published in the "Journal of interesting EKGs" (Editors: Thomas A. Buckingham, MD, FACC, FESC ; Robert Hatala, MD, PhD, FESC, Associate Editor; Harold L. Kennedy, MD, MPH, Associate Editor; )

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