ECG paper (also called ECG recording paper, medical heart test paper, cardiology paper or fetal monitoring paper) is a readout of your heart’s electrical activity on a paper. The paper is marked with small, regular square lines corresponding to specific time intervals. These lines help your doctor track and interpret your heart’s tiny electrical impulses constantly generated.
→For one thing, ECG paper is made from thermal paper.
→which is coated with invisible chemical material that makes it more resistant to changes in temperature and humidity.
→It ensures that the recordings are more accurate, as they are less likely to be affected by environmental factors.