We often have ECG machines sent to us for checking as the users state that the machine is not reading properly. When we test them, we find out there is nothing wrong. There are many reasons for this issue. A common problem is that the paper is inserted incorrectly, and another problem is the skin of the patients is not being prepared properly. The skin should NOT be cleaned with an alcohol swab before applying the electrode as the alcohol is drying and will prevent good conductivity through the electrode. Here is a step by step guide on how to apply the electrodes 1. Clean & prepare the skin All application sites need to be clean, dry and free of lotions. The site always needs to be washed with soap and water and then dried before placing the electrodes. Using alcohol should be avoided as it can dry out the skin, increasing skin impedance and trace artifacts. If needed, any excessive hair should be removed at the placement site. 2. Apply the electrodes First t...