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12-channel miniature wireless digital ECG system

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Bluetooth radiointerface
ISO quality certificate
Certificates of conformance to CIS requirements

General PropertiesTechniquesDelivery SetSpecificationsBack to ECG Systems

Poly-Spectrum-8/EX General Properties [Top]

Do you remember the feeling that appeared when you used the radiophone for the first time? There was no “affection” towards one place. You could move, stand, sit, lie and at the same time speak over the phone freely. The same feeling appears in those who started working with our new digital ECG system Poly-Spectrum-8/EX. This system is not connected by cable with the computer! It can be placed right on the patient's body. The ECG of the patient is transferred by radio with the use of Bluetooth technology on up to 7 meters distance!

In spite of the fact, that data from this digital ECG system are transferred by radio, it has specifications exceeding considerably the ones provided by the wire digital ECG systems represented on the market. The sampling rate of our device is 1000 Hz and A/D converter is 24 bits. Such sampling rate parameters in the aggregate with powerful digital filters which are used for ECG processing in computer, allow to provide the high quality ECG recording.

The digital ECG system Poly-Spectrum-8/EX (base delivery set) allows to register from 1 to 12 ECG leads and 1 breath channel, perform automatical ECG measurement and interpretation, store and print ECG.

This system is more applicable for exercise testing (cycle ergometry, test on treadmill, ortho-test, test on Barany chair, etc.). Just under conditions of patient's intensive movements you can define the advantages of wireless ECG transfer. As far as the digital ECG system is placed on the patient's body, you can use short ECG cable, and this cable vibration will not influence the electrocardiogram quality any more!

If you have Poly-Spectrum-8/EX, you can:

  • Arrange the cycle ergometer or treadmill in any place within 7 meters from computer;
  • Perform such exercise tests as Harvard step test which was impossible with usual digital ECG systems because of noises;
  • Spin your patient on the Barany chair or table for passive ortho-test according to your opinion;
  • Preview the patient's electrocardiogram when she/he is sitting in the corridor behind the door of your room and define, whether the patient's tachycardia is a result of “white doctor's smock” effect.

The new possibilities are also opened for those who register ECG with the use of pocket PC. It is not required to connect the computer to digital ECG system by cable. All the process looks the following way. The electrodes are placed on the patient's body, and the digital ECG system is fixed on an individuals' body or in her/his hands. At the same time the pocket PC is in the doctor's hands who can be within 7 meters from the patient. The doctor can see the ECG on the screen, monitor it for a long time, save it in a PC memory or send it by e-mail if the computer is connected to Internet (for example, with the use of mobile phone).


Exercise testing on treadmill with the use of reusable ECG electrodes fixed by rubber tapes.

“Classic” ECG checkup with the use of reusable limb clamp ECG electrodes and reusable precardial suction chest ECG electrodes.

ECG checkup performing with the use of disposable ECG electrodes and electrocardiogram displaying in the pocket PC.

What is the more important when you choose the digital ECG system for cycle ergometry or treadmill? Of course, the way, the ECG is displayed under conditions of patient's intensive movements.

What are the causes of noises during the exercise testing?

There are three causes for that:

  1. Electrical signals emerging during the big muscles movement (myographic noises).
  2. Shift of electrodes on the surface skin.
  3. ECG cable vibrations that lead to its permittance change, and as a result to ECG baseline deflections.

The purpose of exercise testing is an ECG study at considerable increase of heart work. It is achieved due to big muscles contraction. That is why this cause of noises can not be eliminated. It can be smoothed down by applying myogram filters or arranging the electrodes on places with minimal impact of big muscles contraction on ECG quality.

The shift of electrodes on the skin surface can be eliminated with the use of special electrode systems. The most reliable and simple system is the one with disposable electrodes. The most inexpensive system is the one with rubber tapes for electrode fixation. The most expensive system is the one with vacuum electrodes fixation.

Finally, one of the most serious problems is the cable vibration. How can it be eliminated? Easily. First, it is recommended to shorten the cable length. Second, you should place the digital ECG system… on the patient's body!

Poly-Spectrum-8/EX made the quality ECG registration during exercise testing possible. This device weights about 200 grams and has no wire connection to computer. It can be placed right on the patient's body. The ECG is transferred by radiochannel via Bluetooth interface. The communication range within the direct visibility is not less than 7 meters. For registration you can apply both disposable and reusable electrodes fixed by rubber tapes. And the set of specially developed filters allows to eliminate even powerful noises.

Poly-Spectrum-8/EX Techniques [Top]

Patient K.

Poly-Spectrum-Express is a simple and convenient program for ECG recording which provides high carrying capacity of digital ECG system and allows to use it for mass ECG checkups.

Patient B.

Poly-Spectrum-Analysis is a program for automatic ECG measurement and interpretation.

Example of checkup report automatically generated by Poly-Spectrum software.

Poly-Spectrum-8/EX Delivery Set

Poly-Spectrum-8/EX Extra Delivery Set

  • Poly-Spectrum-Rhythm (software and equipment for heart rate variability (HRV) analysis)
  • Poly-Spectrum-QT software (“Poly-Spectrum” software with “Poly-Spectrum-QT” module for Q-T interval dispersion analysis)
  • Poly-Spectrum-VLP (Software and equipment for ventricular late potentials recording and analysis)
  • Poly-Spectrum-Ergo (software and equipment for stress testing)
  • Poly-Spectrum-Mobile software (software for ECG recording and analysis on communicator)
  • Poly-Spectrum-PWV software (“Poly-Spectrum” software with “Poly-Spectrum-PhS” module for PWV recording and analysis)
  • Poly-Spectrum-PWV (software and equipment for recording and analysis of pulse wave velocity (PWV))
  • Multitraner software for cardiac rehabilitation with ECG control

Poly-Spectrum-8/EX Specifications [Top]

Number of ECG channels12
ECG leadsI, II, III, aVR, aVL, aVF, V1…V6; X, Y, Z (by Frank)
Number of breath channels1
Number of temperature measurement channels1
A/D converter24 bit
Sampling rate250, 500, 1000 Hz
Frequency response0.05 ÷ 250 Hz
Low pass filter35 Hz (myogram), 75 Hz
High pass filter0.05 Hz (3.2 s)
AC filter50 (60) Hz
Drift filteryes
Sensitivity2.5, 5, 10, 20, 40 mm/mV
Paper speed5, 10, 25, 50, 75, 100, 200 mm/s
Common-mode rejection, not less than100 dB
Input range± 330 mV
Input impedance, not less than20 MΩ
Noise level, not more than15 μV
Temperature measurement range30.0 ÷ 45.0°С
Defibrillation protectionyes
Control of electrode settingyes
InterfaceBluetooth radiointerface
Communication range in the direct visibility, not less than7 meters
Supply Voltage:
Electronic unit2 Ni-MH or Ni-Cd rechargeable batteries of AA type (R6)
Continuous working time, not less than6 hours
Desktop PC-based system220/230 V AC (50 Hz) / 110 V AC (60 Hz)
Notebook PC-based system220/230 V AC (50 Hz) / 110 V AC (60 Hz) / int. battery
Electronic unit140×70×24 mm
Delivery set250×190×150 mm
Electronic unit with batteries, not more than0.2 kg
Delivery set (without computer and printer), not more than3 kg
SafetyBF type

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Updated 26.12.2005
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