Why count an irregular pulse for a full minute?

The question

I counted the pulse for 30 seconds and doubled it, but the beats felt uneven. Can I trust that number?

Understand

Counting a pulse for 30 seconds and doubling it works when the beat is regular, because the gaps between beats are even. An irregular pulse has uneven gaps, so one half-minute can hold far fewer beats than the other, and doubling assumes they match. In this example, student nurse Alex counts 42 beats in the first 30 seconds (84), then 66 in the next (132), but the full-minute count is 108, above the usual range, so Alex tells the supervising nurse. That's why an irregular pulse is counted for a full minute, and recorded as irregular. A normal adult resting pulse is usually 60 to 100 beats a minute. Alex, Mr Brown and all numbers are fictional examples, and the drawings are simplified teaching schematics. Charts and rules vary, so follow your local policy. If your own pulse feels irregular, get it checked by a health professional.

1. Doubling a 30-second count assumes the second 30 seconds holds as many beats as the first.
2. A regular pulse has evenly spaced beats, so every half-minute fits the same number. Doubling works.
3. An irregular pulse has uneven gaps: beats bunch up, then pause. One half can catch more beats than the other.
4. A full minute counts both halves, so nothing is assumed: the count is the rate.

Key takeaways

• Feel the rhythm first: it decides how long you count.
• Irregular? Count a full 60 seconds. A doubled 30 s count can be far off.
• Record the rate and the rhythm (regular or irregular).
• A new irregular pulse, or a rate outside the range: report it, as your local policy says.

In practice

• Feel the rhythm first: it decides how long you count.
• Irregular? Count for a full 60 seconds.
• Record the rate and the rhythm (regular or irregular).
• A new irregular pulse, or a rate outside the usual range: tell your supervising nurse and follow your local policy.

Check yourself

Mrs Lee's pulse feels irregular. After 30 seconds you have counted 38 beats. What do you write on the chart?

Words to know

Pulse rate

beats per minute; a normal adult at rest is usually 60–100

Radial pulse

the pulse at the wrist, on the thumb side (radi- (the radius, the thumb-side forearm bone) + -al (of))

Regular rhythm

evenly spaced beats

Irregular rhythm

uneven gaps between beats

Transcript

Sources

1. Lapum JL et al. Vital Sign Measurement Across the Lifespan (Ryerson University, CC BY), 3.17 What Pulse Qualities are Assessed?: count for thirty seconds if the rhythm is regular and multiply by two; count for one minute if the rhythm is irregular; regularly irregular vs irregularly irregular (the latter highly specific to atrial fibrillation) (read 10 October 2026)
2. Open RN. Nursing Skills 2e, 1.3 Vital Signs: best practice is to assess a pulse for a full 60 seconds, especially if the rhythm is irregular; document regularly vs irregularly irregular; normal adult pulse at rest 60-100 beats per minute (read 10 October 2026)
3. Heart Foundation NZ - How to check your pulse (heart rate): normal resting rate generally 60-100; an irregular pulse is when the heart doesn't beat in a regular, steady rhythm; get an irregular pulse checked by a health professional (read 10 October 2026)

Checked against these sources at the time of publishing. Sources change, so check the date above and your local policy. Spotted an error? Tell us and we'll correct it.