Which measurement is represented by a large box on ECG paper?

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Prepare for the West-MEC Medical Assisting Technical Skills Assessment. Study with flashcards and multiple choice questions, with comprehensive hints and explanations. Get exam ready!

Multiple Choice

Which measurement is represented by a large box on ECG paper?

Explanation:
On ECG paper, each small box is 1 mm, and five of these small boxes form one large box, so the large box measures 5 mm across. That 5 mm also corresponds to a time interval of 0.2 seconds at the standard paper speed of 25 mm/s, which is why large boxes are used to gauge timing in addition to their width. So the measurement represented by a large box is 5 mm.

On ECG paper, each small box is 1 mm, and five of these small boxes form one large box, so the large box measures 5 mm across. That 5 mm also corresponds to a time interval of 0.2 seconds at the standard paper speed of 25 mm/s, which is why large boxes are used to gauge timing in addition to their width. So the measurement represented by a large box is 5 mm.

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