The RRR medical abbreviation means regular rate and rhythm, a cardiac exam finding that says the heart is beating at a normal speed with an even, steady pattern when heard through a stethoscope. It almost always appears after the heading CV, for cardiovascular, as in "CV: RRR, no murmurs."
RRR is one of the most common phrases in any physical exam note, so it shows up in visit summaries for patients and students write it on day one. In research papers and drug studies, the same letters stand for relative risk reduction, a statistic, a separate concept entirely. Below, the exam sense comes first, then the research one.
At a glance
Stands for
Regular rate and rhythmOther meanings
Relative risk reduction, in research and statisticsWhere you see it
CV or heart line of a physical examOften paired with
S1 S2, no m/r/g (murmurs, rubs, gallops)Specialty
Every field that does a physical exam; cardiologyDo not confuse with
NSR, a rhythm read from an EKG tracing
What the RRR medical abbreviation means in a cardiac exam
RRR combines two observations. Rate is how fast the heart beats. For resting adults a normal rate usually falls between about 60 and 100 beats a minute, though clinics and hospitals set their own ranges and children run faster. Rhythm is the pattern. A regular rhythm has an even gap between beats, like a steady drum, rather than a random or skipping pattern.
When both look normal on listening, the clinician writes RRR. If the heart is fast, slow or uneven, the note will say so instead, such as tachycardic, bradycardic or irregularly irregular.
Heart RRR in a full CV line, piece by piece
RRR rarely stands alone. A typical normal heart exam reads like the sample below.
| Shorthand | Meaning |
|---|---|
| CV | Cardiovascular section of the exam |
| RRR | Regular rate and rhythm |
| S1 S2 | The two normal heart sounds, the lub and the dub |
| no m/r/g | No murmurs, rubs or gallops, which are extra or abnormal sounds |
| no JVD | No bulging of the neck veins |
| cap refill < 3 sec | Fingernail color returns quickly after a press, a sign of good blood flow |
Clinic visit summary: "CV: RRR, no m/r/g. Lungs: CTAB." The heart sounded normal with no extra sounds, and the lungs were clear on both sides.
RRR versus NSR and other rhythm terms
RRR is a finding made with a stethoscope. It cannot tell exactly where each beat starts in the heart. NSR, normal sinus rhythm, is read from an electrocardiogram and confirms that each beat begins in the heart's natural pacemaker. A patient can have RRR on exam and NSR on the tracing, and both notes are describing the same healthy heartbeat from different angles.
Other common rhythm words include irregularly irregular, often heard with atrial fibrillation, and RVR, rapid ventricular response, which describes a fast heart rate in that rhythm. The EKG page explains how tracings are read.
RRR as relative risk reduction
In research and medical statistics, RRR means relative risk reduction. It describes how much a treatment lowers the chance of an outcome compared with no treatment, expressed as a share of the original risk. For example, if a bad outcome falls from 10 in 100 people to 5 in 100, the relative risk reduction is 50 percent, while the absolute drop is 5 in 100.
You will meet this meaning in study summaries and pharmacology courses, not in a patient's exam. If RRR sits next to a percentage or a trial result, it is the statistic. If it follows CV or heart, it is the exam finding.
Charting RRR as a student
Only chart RRR after you have actually listened, ideally at several spots on the chest and for long enough to judge the rhythm. If you hear an extra sound or a skipped beat, describe it rather than defaulting to the normal phrase. Pair it with the pulse you felt and the rate from the vital signs so the record agrees with itself.
Exam shorthand of this type is collected in the chart and nursing abbreviations section.
An exam phrase captures one moment. For what your heart findings mean for you, speak with the clinician who listened to your heart.
Frequently asked questions
What does RRR mean on a heart exam?
It means regular rate and rhythm. The heart was beating at a normal speed with an even pattern when the clinician listened.
What does RRR no m/r/g mean?
It means regular rate and rhythm with no murmurs, rubs or gallops. In plain words, the heart sounded normal with no extra sounds.
Is RRR the same as normal sinus rhythm?
Not quite. RRR comes from listening with a stethoscope, while normal sinus rhythm is confirmed on an EKG. They often go together in a healthy heart.
What does RRR mean in a research study?
In research it stands for relative risk reduction. It shows how much a treatment lowered the risk of an outcome compared with the starting risk, as a percentage.