MEDICAL
ARTERIES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
One small box on ECG paper is equivalent to how much time?
|
|
0.004 seconds
|
|
|
0.4 seconds
|
|
|
0.04 seconds
|
|
|
4 seconds
|
Explanation:
Detailed explanation-1: -The ECG paper speed is ordinarily 25 mm/sec. As a result, each 1 mm (small) horizontal box corresponds to 0.04 sec (40 ms), with heavier lines forming larger boxes that include five small boxes and hence represent 0.20 sec (200 ms) intervals.
Detailed explanation-2: -Small box method The reason we use 1, 500 is because there are 1, 500 small boxes in one minute on an EKG. You are basically checking how many spaces-between-R-waves there are in a minute, and that’s your heart rate! A great example of this process is as follows: We observe/count 12 small boxes between R waves on an EKG.
There is 1 question to complete.