ECG Rate Interpretation
Understanding paper speeds Paper output speed is the rate at which the ECG machine produces a trace Standard output is 25mm per second If a different paper speed is used, standard rate calculations will have to be modified appropriately (see other examples below) The standard paper speed is 25mm/sec: 1 SMALL square (1mm) = 0.04 sec (40ms) 5 SMALL squares (5mm) = 1 LARGE square = 0.2 sec (200ms) 5 LARGE squares = 1 second ...