what measurement does each square along the horizontal axis on ekg paper represent
How to Read an ECG Strip. ECG paper is a grid where time is measured along the horizontal axis. Each small square is 1 mm in length and represents 0.04 seconds. Each larger square is 5 mm in length and represents 0.2 seconds. Voltage is measured along the vertical axis. 10 mm is equal to 1mV in voltage. The diagram below illustrates the configuration of ECG graph paper and where to measure the components of the ECG wave form