Question: what is the difference between 3 channel and 12 channel ecg?
Answer: 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. To print all the 12 waveform it takes 4 slot on the ECG chart paper ( It is also called 3x4 format ) .