MEDICAL
ARTERIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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On ECG graph paper, 1 large box equals:
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0.04 seconds
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0.20 seconds
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2 seconds
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1 second
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Explanation:
Detailed explanation-1: -If it is 1 big box (0.2 secs) then the rate is 60/0.2 = 300 bpm.
Detailed explanation-2: -5 SMALL squares (5mm) = 1 LARGE square = 0.2 sec (200ms) 5 LARGE squares = 1 second.
Detailed explanation-3: -Each large box is therefore only 0.10 sec and each small box is only 0.02 sec. In addition, the heart rate appears to be one-half of what is recorded at 25 mm/sec paper speed, and all of the ECG intervals are twice as long as normal. Other paper speeds are occasionally used.
Detailed explanation-4: -The ECG grid On the horizontal axis, each large box represents 0.2 seconds at a typical paper speed of 25 mm per second, which is then divided into five smaller boxes that each represent 0.04 seconds.
There is 1 question to complete.