Electrocardiogram (ECG) paper contains a standardized grid where the horizontal axis measures time and the vertical axis measures voltage or amplitude. The nurse must understand that each horizontal box indicates:
a. 200 milliseconds or 0.20 seconds duration.
b. 40 milliseconds or 0.04 seconds duration.
c. 3 seconds duration.
d. millivolts of amplitude.
B
ECG paper contains a standardized grid where the horizontal axis measures time and the vertical axis measures voltage or amplitude. Horizontally, the smaller boxes denote 0.04 seconds each or 40 milliseconds; the larger box contains five smaller boxes and thus equals 0.20 seconds or 200 milliseconds.
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