In an EKG, what time duration is measured by a 5 times 5 mm square?

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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

In an EKG, what time duration is measured by a 5 times 5 mm square?

Explanation:
On ECG paper at the standard speed of 25 mm per second, time is read along the horizontal axis. Each small square is 1 mm wide and represents 0.04 seconds. A 5×5 mm square spans five small squares along the time axis, so its duration is 5 × 0.04 seconds = 0.20 seconds. That's why the 5×5 mm square corresponds to 0.20 seconds.

On ECG paper at the standard speed of 25 mm per second, time is read along the horizontal axis. Each small square is 1 mm wide and represents 0.04 seconds. A 5×5 mm square spans five small squares along the time axis, so its duration is 5 × 0.04 seconds = 0.20 seconds. That's why the 5×5 mm square corresponds to 0.20 seconds.

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