Rhythm InterpretationQuestion 35 of 100
On standard EKG paper running at 25 mm/sec, how far apart are the vertical time markers printed at the top of the strip used for the six-second method?
a.Three seconds apart, so two intervals equal six seconds
b.One second apart, so six intervals equal six seconds
c.Six seconds apart, so one interval equals six seconds
d.Half a second apart, so twelve intervals equal six seconds
Explanation
EKG paper is marked at three-second intervals, which equals 15 large boxes, so a six-second strip spans two marked intervals or 30 large boxes. Each large box is 0.20 second and each small box is 0.04 second at the standard 25 mm/sec speed. The other spacings do not correspond to how standard EKG paper is printed.
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