3 channel ecg machine

About 3 channel ecg machine

In 3 channels machines the ECG signals selected by the microprocessor are amplified , filtered and sent to a 3 channel multiplexer. The multiplexed analog signals are then given to an analog to digital converter which is then stored and sent to digital to analog converter for reconstructing the analog signals and these signals are de-multiplexed and passed to the chart recorder / Printer  or video display to display the same .

A three channel ECG machine print 12 waveform in 4 sections. this report format is called 3x4 format . 3 Channel ECG Machine also print a rhythm lead in some cases. 

3 channel ECG Machine prints 3 waveforms at a time on the charting paper  1st section waveform ( I,II,II ) 

3 waveform in 2nd section  ( aVR , aVL, aVF )

3 waveform in 3rd section  (  V1, V2, V3 )

3 waveform in 4th section ( V4, V5,V6 )

To print all the 12 waveform it takes 4 slot on the ECG chart paper ( It is also called 3x4 format )  . below fig shows a ECG report from 3 channel ECG Machine . Print report from 3 ch ECG machine is usually longer on paper as compare to 6 channel and 12 channel ECG Machine .

Major 3 channel ECG report are usually printed on 60mm/80mm or 100mm ECG paper depending on the size of printer available in the machine . It depends on the ECG Machine model and price .