ECG

What is ECG?

When impulses passes through heart the electrical current also spreads to the surrounding tissue and to surface of body.When electrodes are placed on the surface then it can record the electrical activity.This is known as ECG

ECG Paper:

ECG Paper: contains small and large squares.

Each small squares is 1mm and large square is 5mm

Time is measured along horizontal line and each small square is 0.04s and each large square is 0.2s.