An electrocardiogram (ECG) rhythm strip typically contains how many large blocks in a 6 second strip?

In a standard electrocardiogram (ECG) rhythm strip, the paper typically moves at a speed of 25 millimeters per second. A large block on the ECG paper is 5 millimeters wide. Given this information, each large block represents 0.2 seconds of time (5 mm / 25 mm/s).

To understand how many large blocks fit into a 6-second ECG strip, we first need to determine how many 0.2-second intervals fit into 6 seconds. This is done by dividing 6 seconds by 0.2 seconds:

6 seconds / 0.2 seconds per large block = 30 large blocks.

This calculation shows that a 6 second strip will contain a total of 30 large blocks, making it the correct answer. Each of these blocks helps in measuring the time intervals between the heartbeats, making it crucial for assessing heart rhythm and overall cardiac function.