An ECG electrode is:
a conductive pad that is attached to the skin to record electrical activity. The data gathered from several electrodes allow for instance the 12 leads of an ECG to be calculated. For instance lead I is calculated using data from the electrodes on both the right and left arm.
An ECG lead is:
a graphical representation of the heart’s electrical activity which is calculated by analysing data from several ECG electrodes.
A Single Channel ECG is:
There is one amplification channel in a single-channel ECG module. These devices usually have a multi-position switch, which can be used to pick the desired lead. With this type of instrument, only one lead at a time can be registered.
Three Channel ECG:
On 3 channel machines, the ECG signals selected by the microprocessor are amplified, filtered and sent further.
Six Channel ECG:
6 Channel ECG System prints in one go 6 waveforms. So compared to 3 channel ECG Device, its paper width is wide. Six-channel ECG System print format would be 6×2. 6 Channel ECG The length of the reporting system is comparatively smaller as the width of the page is wide.
12 channel ECG is:
A 12-lead ECG is an effective clinical decision-making method and can provide a wealth of information such as diagnosis of developing MI; detect life-threatening arrhythmias; long-term effects of persistent hypertension; or acute pulmonary embolus symptoms. Unlike cardiac monitoring, the 12 lead ECG displays the heart’s 3-dimensional electrical activity captured from twelve separate leads or points of view. It gives the entire photo. So it’s also called an ECG system multichannel. Most of the 12 channel ECG machine is known to print on A4 size paper ECG sheet. And the report is broad and low. It makes it easy for doctors to examine the ECG waveform and compare it.
Source:
https://tentabs.in/blogs/news/what-is-channel-ecg-machine-and-what-is-ecg-machine-used-for