Resting heart rate of 64 bpm in babies
| Where it fallsthe AHA adult range and PALS paediatric ranges | Well below the range |
|---|---|
| Resting heart ratefor under 1 year | 64bpm |
| Usual reference range | 100 – 180bpm |
| One beat every | 0.94seconds |
| Beats in a day at this rate | 92,160beats |
| Well below the rangethis reading | under 80bpm |
| Below the range | 80 – 99bpm |
| Within the range | 100 – 180bpm |
| Above the range | 181 – 219bpm |
| Well above the range | 220 and abovebpm |
Notes
- A resting heart rate of 64 bpm is outside the range a web page should be the end of. Repeat the measurement, and contact a doctor rather than reading further. If it comes with chest pain, breathlessness, confusion, weakness or a change in vision, treat it as an emergency.
- Reference ranges differ between laboratories. The bands above follow the AHA adult range and PALS paediatric ranges. Your own report prints the range its analyser was calibrated against, and that printed range is the one to compare against — a difference of a few units between labs is normal and does not mean either is wrong.
- Resting means genuinely at rest. Sitting quietly for five minutes first, not just sitting down. Standing up adds roughly 10–15 bpm, a full bladder adds a few, and caffeine, nicotine, a recent meal, pain, anxiety, dehydration and a warm room each move it. The most representative reading is the one taken in bed before getting up.
- Children's hearts beat faster, and the gap is large. A rate of 120 is unremarkable in a two-year-old and clearly fast in an adult, which is why a single "normal heart rate" chart applied to a child is misleading. Count it while the child is settled and not crying — crying alone can add 30 bpm or more.
- Rate and rhythm are different questions. A pulse can sit inside the normal range and still be irregular, and an irregular pulse is the finding that atrial fibrillation screening looks for. If beats feel skipped or the interval is uneven, that is worth reporting even when the number itself looks fine.
What resting heart rate of 64 bpm means
A reading of 64 bpmfor under 1 year falls in Well below the range by the AHA adult range and PALS paediatric ranges.
The usual reference range is 100 – 180 bpm.
Reading it next to the rest of the picture
A single figure is a snapshot. What a clinician does with it is set by what sits around it — the other results on the same report, what the person is being treated for, what they were doing in the hours before the sample, and what the previous result was. Two people can hand over the same number and leave with different advice, and neither has been given the wrong answer.
That is also why the bands on this page are drawn from a named guideline rather than from a rounded rule of thumb. A threshold is a decision point somebody argued for in print, not a law of nature, and knowing which document a line comes from is what lets you tell a meaningful result from a borderline one.
Nearby sizes
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- Respiratory Rate by Age: 12–20 for Adults, Much Faster for ChildrenThe most informative vital sign and the least often taken. It is also the only one that changes the moment the person knows you are measuring it.