In vital signs and nursing notes, the HR medical abbreviation almost always means heart rate, the number of times the heart beats in one minute. It sits beside blood pressure, breathing rate, and oxygen level in nearly every set of vitals.
The same letters have other standard uses. Written in lowercase, hr is short for hour. In clinical research, HR means hazard ratio, a way of comparing risk between groups. In breast cancer reports, HR stands for hormone receptor status. Context and the way the letters are written tell them apart.
At a glance
Stands for
Heart rate, in beats per minuteOther meanings
Hour (hr); hazard ratio (research); hormone receptor (oncology)Normal range
Resting adults usually about 60 to 100 beats per minuteWritten as
HR, hr, sometimes P for pulseWhere you see it
Vital signs, flowsheets, monitors, study results, pathology reportsDo not confuse with
RR (respiratory rate) and BP (blood pressure)
Heart rate: the everyday HR medical abbreviation
Heart rate is counted in beats per minute, often written bpm. A nurse may count it by feeling a pulse at the wrist, or a monitor may read it from a finger sensor or ECG leads. For most resting adults, about 60 to 100 bpm is the usual range. Trained athletes and people on some heart medicines often run lower, and children have higher normal rates. Your own clinic may use slightly different limits.
A rate over 100 is called tachycardia and a rate under 60 is called bradycardia. Pain, fever, dehydration, anxiety, and exercise can all raise it for a time.
Reading HR in a vital signs line
| Entry | Meaning |
|---|---|
| BP 128/76 | Blood pressure in mmHg |
| HR 88 | Heart rate, 88 beats per minute |
| RR 16 | Respiratory rate, 16 breaths per minute |
| SpO2 98% on RA | Oxygen saturation 98 percent on room air |
Taken together, these are often summed up as VSS, vital signs stable. Heart rhythm, such as NSR for normal sinus rhythm, is described separately from the rate.
Hr as hour in orders and notes
In lowercase, hr usually means hour, as in "NPO for 8 hr" or "urine output 30 mL/hr." Frequency shorthand such as q4h uses just the letter h. Because a quick glance can blur HR and hr, careful writers spell out "hour" in orders where the meaning could matter, and electronic systems often print it in full.
HR medical abbreviation hazard ratio in clinical studies
In journal articles and study summaries, the hr medical abbreviation hazard ratio meaning compares how often an event, such as death or relapse, happens over time in one group versus another. A hazard ratio of 1 means no difference. Below 1 means the event happened less often in the first group, and above 1 means more often.
Study result: "HR 0.75, 95% CI 0.62 to 0.91." At any point during follow up, the treated group had about a 25 percent lower rate of the event than the comparison group. The confidence interval, CI, does not cross 1, which supports a real difference.
So in clinical research, HR is a statistic, not a pulse.
Hormone receptor in breast cancer
The hr medical abbreviation hormone receptor meaning appears in breast cancer pathology and oncology notes. A tumor is called HR positive when its cells carry estrogen receptors, progesterone receptors, or both. Reports may read "HR+/HER2 negative." This status helps decide whether hormone blocking treatments are likely to help. The individual receptor results are explained on the PR page.
Telling the four meanings apart
| Where you see it | Example | Meaning |
|---|---|---|
| Vital signs or monitor | HR 72 | Heart rate |
| Order or intake record | 30 mL/hr | Hour |
| Study abstract | HR 1.20 (CI 1.05 to 1.38) | Hazard ratio |
| Pathology or oncology note | HR+ breast cancer | Hormone receptor |
The lab, test and measurement abbreviations hub covers more short forms found on flowsheets and reports.
One reading or one statistic seldom settles anything on its own. Your nurse or doctor can put any value in your chart into context.
Frequently asked questions
What does HR mean in vital signs?
It means heart rate, the number of heartbeats per minute. For most resting adults, a value of about 60 to 100 is in the usual range.
What does HR mean in clinical trials?
In research, HR means hazard ratio. It compares the rate of an event over time between two groups, with 1 meaning no difference.
What does HR positive mean in breast cancer?
It means the cancer cells have hormone receptors for estrogen, progesterone, or both, which can make hormone therapy an option.
Is HR the same as pulse?
They are closely related. Pulse is the beat felt in an artery, and heart rate is how often the heart beats, so the two numbers usually match.