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QRS Universal ECG

QRS offers ready to use electrocardiographs complete with the ECG, electrodes, and Office Medic Software. The portability and ease of use with QRS EKG products allows you to perform resting ECG anytime, anywhere.



About: The Universal ECG uses the Louvaine analysis program which was found to have the best total accuracy when compared to nine popular competing algorithms by cardiologists¹..


Control Patients  N=382 Ventricular Hypertrophy N=291 Myocardial Infarction N=547 Total Accuracy N=1220
Padova 89.8 61.3 47.1 62.0
Nagoya-Fukuda 89.3 42.6 63.7 65.6
IBM Medis 91.3 49.4 62.5 67.6
HP (Agilent) 93.5 51.0 64.5 69.3
Glasgow 94.0 51.0 67.7 69.7
GE (Marquette) 86.3 61.1 69.7 69.7
Means 97.1 42.5 67.2 69.8
Hannover 86.6 72.1 79.0 75.8
Louvaine (Louven) 91.5 67.0 82.1 77.3
8 Cardiologists Combined Scores 97.1 60.4 80.3 79.2

The numbers in the table above represent the percent correct diagnosis.

Red = Highest Score, Green = 2nd Highest Score, Blue = 3rd Highest Score


The Louvaine algorithm was also the best in correctly diagnosing myocardial infarction and the second best in diagnosing Ventricular Hypertrophy.  For additional information about the Louvaine algorithm, download the Universal ECG Algorithm brochure.



¹Willems, J.L., et al., “The New Diagnostic Performance of Computer Programs for the Interpretation of Electrocardiograms”, New England Journal of Medicine (1991); 325: 1767-1773.



    • Incomparable Accuracy – The Universal ECG uses the Louvaine analysis program. The Louvaine algorithm had the best total accuracy of the 9 popular algorithms compared by cardiologists to a standardized database of ECG tracings. (See the About tab for more information.)Multiple Report Options – Office Medic offers multiple options for viewing the Universal ECG reports and they are transferable to PDF, JPEG, or TIFF formats.
      • 3×4 Simultaneous
      • 3×4 Sequential
      • 6×2 ECG
      • 6×1 ECG
      • Averaged Complexes
      • Measurements Report
      • Avg. Zoom Report
      • Zoom Report

      Click here to see a sample 9-page report, page headline on sample report indicates report option (listed above).

      Lightweight & Portable – The Universal ECG weighs less than 12 ounces and can easily be transported to new patient rooms, clinic locations or any off site location where an ECG needs to be performed. Also, no batteries are required for the Universal ECG because it draws its power from the computer (connected via USB port).


      Why Perform Diagnostic ECG Tests? – ECG testing has increased the diagnosis of heart disease.  ECGs provide physicians a baseline to compare the health of a heart on a recurring basis.  They also help diagnose, monitor and treat patients with symptoms of heart health issues.  For more benefits and statistics about electrocardiography and reasons for performing ECGs, download our Electrocardiography Key Facts brochure.

The Universal ECG comes equipped with everything you need to begin testing.


  •  Universal 12-Channel ECG
  •  QRS Resting ECG Tab Electrodes, 100
  •  Sure-Lock Snap & Tab Electrode Adapters, 10
  •  Lead Placement Guide
  •  Office Medic Software


Also included with the Universal ECG is a three-year warranty.  Click here for full details of the hardware warranty.


Universal ECG™ Specifications

Hub Weight


250-335 grams (depending on cables)


Hub Dimensions


85 mm x 91 mm x 20 mm (3.3” x 3.6” x .8”)


Patient Leads Length


Limb Leads: 1 meter Chest Leads: 0.6 meter

PC Connection Length


1-3 meters USB A type Connector (USB version)


Patient Leads


12-Lead Cable (10 Patient Leads)


Case Material


ABS Plastic


Electrode Connection


4 mm Banana plug with “snap” or “tab” connectors


Display & Operating Console


Dependent on PC (Supplied by user)


Gain Sensitivity


5, 10, 20 mm/mV




12.5, 25 and 50 mm/s


Input Range


±6 mV


Acquisition Sample Rate


1000 samples/sec.

(Compressed to 500 Hz with peak picking and averaging algorithm)


Heart Rate Range


30 – 170 bpm


Frequency Response


0.05 – 175 Hz ±3dB


Defibrillation Protection


Patient leads are isolated from system and operator, with 4kV protection


Common Mode Rejection


-60dB (minimum)


Safety Standards


Complies with AAMI EC11, EN60601-1, EN60601-2, EN60601-2-25


Leads Off Indicators


Connection status for each lead is shown on Acquisition screen


Power Source


PC, powered from USB interface


Supply Voltage


4-16 V DC


Supply Current


< 17 mA DC


Permanent Filters



High Pass: 0.05 Hz 1st order; Low Pass: 170 Hz 1st order


Baseline Wander: Baseline reset by adaptive zeroing algorithm


Notch filter

(Mains noise Rejection)



50 Hz 4th order Butterworth,

49.1 Hz – 50.9 Hz,

60 Hz 4th order Butterworth,

59.1 Hz – 60.9 Hz


Low Pass

(Muscle Artifact Filter)


35 Hz 4th order


Report Capabilities



User Selectable Report Formats: (1) 3×4 Simultaneous; (2) 3×4 Sequential; (3) 6×2 ECG; (4) 6×1 ECG; (5) Averaged Complexes ECG; (6) ECG Measurements Report; (7) Avg. Zoom Report; (8) Zoom Report



Rhythm, Morphology


Environmental Conditions



Operating Temperature: 0-40°C

Storage Conditions: -20-70°C

Humidity: 85% Max. (non-condensing)

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Additional Product Information
Universal ECG Brochure ECG Consumables Universal ECG Sample Report
Universal ECG Brochure (French) ECG Reimbursement/ICD-9/EKG CPT Codes Universal ECG Printed Reports
FAQS – Universal ECG Universal ECG Algorithm Universal ECG Specifications
System Requirements – Universal ECG Compatibility – Universal ECG Universal ECG Return on Investment