What Is a Peripheral Pulse and How Is It Measured?

A peripheral pulse is the beat of the heart’s pressure wave felt in an artery away from the heart, such as at the wrist, neck, groin, knee or foot. Each heartbeat sends that wave through the arteries, and where an artery runs close to the skin you can feel it. Checking it tells you not just how fast the heart beats but whether blood is reaching the arms, legs and feet. For most people it is still measured the oldest way, with fingertips over an artery, though watches and phones now read it with light.1PubMed Central. A Brief Journey into the History of the Arterial Pulse

What You Are Actually Feeling in a Pulse

The heart pushes blood out in bursts, and the aorta, the body’s main artery, stretches to store some of that push, then springs back between beats.2Indian Journal of Cardiovascular Disease in Women WINCARS. Arterial Pulse That keeps blood moving in the limbs even while the heart refills, with smaller pressure swings than inside the heart.3Indian Journal of Cardiovascular Disease in Women WINCARS. Arterial Pulse The pressure wave runs down the arteries many times faster than the blood itself flows.4Indian Journal of Cardiovascular Disease in Women WINCARS. Arterial Pulse So the beat at your wrist is the wave stretching the artery wall under your finger.5Indian Journal of Cardiovascular Disease in Women WINCARS. Arterial Pulse6Annual Review of Fluid Mechanics. Pulse Wave Propagation in the Arterial Tree

Normally each heartbeat produces one pulse beat, so counting the pulse counts heartbeats. Some weak beats may not push enough blood to be felt at the wrist, which is one way the two numbers can differ. A resting adult pulse usually runs about 60 to 100 beats per minute.

Some spots give a clearer beat than others. Arteries lying over bone near the skin are easiest to feel. Cold or narrowed vessels further out give weaker beats.

Where to Find Each Pulse Point

The apical beat is different, because it is heard at the heart’s tip on the left chest, usually with a stethoscope, rather than felt at an artery.23Central Asian Journal of Multidisciplinary Research and Management Studies. ARM AND LEG ARTERIES: BRANCHES, PULSATION POINTS Comparing it with the wrist shows whether every beat reaches the arm.24Cleveland Clinic. What Are Pulse Points and Where Can You Find Them?

To find the foot pulse at home, ask the person to lift the big toe so the tendon shows, then slide two fingers beside it. Search a small area slowly, since the artery’s position varies. A foot pulse that is hard to find in a healthy person is not automatically a problem, though people with diabetes are often told to have their foot pulses checked.

The neck and temple need extra care. The carotid artery carries blood to the brain and a sensitive pressure spot sits nearby, so this is the one place where pressing carelessly can cause harm. Press gently with two fingertips on one side only, light enough that you can still feel the beat clearly. The temple pulse is faint and sits over thin bone, so it is usually felt only with a very light touch, and a clinician checks it when headache and tenderness raise concern.

How to Check a Pulse by Touch

Use the index and middle fingertips, not the thumb, because the thumb has its own pulse that can confuse the count.25ProTrainings. How to Check a Pulse Wrist and neck pulses need light pressure, groin and knee need firm, and the ankle moderate.26Central Asian Journal of Multidisciplinary Research and Management Studies. ARM AND LEG ARTERIES: BRANCHES, PULSATION POINTS Pressing too hard flattens the artery and makes the beat vanish, especially at the temple.27ProTrainings. How to Check a Pulse28Central Asian Journal of Multidisciplinary Research and Management Studies. ARM AND LEG ARTERIES: BRANCHES, PULSATION POINTS Never press both sides of the neck at once, because that can cut blood flow to the brain.29Central Asian Journal of Multidisciplinary Research and Management Studies. ARM AND LEG ARTERIES: BRANCHES, PULSATION POINTS For foot pulses, lie flat with feet bare and relaxed.30BackTable. Pedal Pulse Assessment: Location, Grading, & Clinical Use

For a wrist check, turn the palm up and rest the arm at heart level. Place your fingertips on the thumb side just above the wrist crease, then ease the pressure until the beat is clearest. Watch a second hand or phone timer while counting. Then count the beats for 30 seconds and double the number, or count a full minute if the rhythm seems irregular.

Getting the person ready helps. Have them sit or lie comfortably with the arm supported, since a tense or dangling arm makes the beat harder to feel. Exercise or emotion speeds the pulse, so let the person rest a few minutes first.31ProTrainings. How to Check a Pulse If you are checking your own, avoid doing it just after coffee, a hurried walk or a stressful phone call.

If you can’t feel anything, your fingers may be slightly off the artery, so shift sideways a little. Cold hands or limbs narrow small vessels, and in some people the arteries simply sit deeper.

Once you find the beat, note whether the gaps between beats are even, as the spacing shows the rhythm. Notice whether the beats feel equally strong or vary, since uneven strength can matter even when the rate seems normal.

How Pulse Strength Is Graded

A 1+ pulse can be expected in older adults or people with long-term vessel disease but should be recorded and watched.37BackTable. Pedal Pulse Assessment: Location, Grading, & Clinical Use A bounding 4+ pulse can reflect a body working hard or a bulging artery.38BackTable. Pedal Pulse Assessment: Location, Grading, & Clinical Use

Check the same point on the left and right. A clear difference between sides matters more than one weak reading. The scale relies on the examiner’s fingertips, so two people may grade the same pulse slightly differently.

What an Abnormal Pulse Can Mean

Missing pulses can map a blockage. No groin pulse can mean a blockage in the main artery.39Cleveland Clinic. What Are Pulse Points and Where Can You Find Them? A groin pulse with no knee pulse points to a blockage in the thigh.40Cleveland Clinic. What Are Pulse Points and Where Can You Find Them? An absent inner-ankle pulse, especially after walking 20 steps, suggests serious leg blockages.41Cleveland Clinic. What Are Pulse Points and Where Can You Find Them? In a tear of the main artery wall, about 3 in 10 hospital patients have weak or missing pulses.42PubMed. Usefulness of pulse deficit to predict in-hospital complications and mortality in patients with acute type A aortic dissection The highest point where the beat fades marks the likely site, and the pulses above it usually stay normal.

Walking can reveal what rest hides. Working leg muscles demand more blood than a narrowed artery can supply, so a pulse that was present at rest can weaken or disappear afterward.

Rhythm problems show up differently. A pulse deficit is when the wrist count is lower than the heartbeat count heard by stethoscope.43Cleveland Clinic. What Are Pulse Points and Where Can You Find Them? Some beats are too weak to push enough blood out to be felt,44The Journal of Clinical Investigation. Studies on the Effect of Cardiac Irregularity on the Circulation: I. The Relation of Pulse Deficit to Rate of Blood Flow in Dogs Subject to Artificial Auricular Fibrillation and to Regular Tachycardia45Cleveland Clinic. What Are Pulse Points and Where Can You Find Them?

The shape of the beat can also be a clue. A pulse that slams up and collapses can signal a leaking aortic valve, and in one case it faded after valve replacement.46PubMed Central. Water hammer and Corrigan’s pulses A pulse that weakens markedly when breathing in can signal fluid pressing on the heart.47Stanford Medicine 25. Understanding Pulsus Paradoxus

A cold, pale leg with no pulse is an emergency, as is sudden tearing chest or back pain with unequal pulses. An irregular pulse at rest is worth reporting to a doctor. Leg pain on walking that eases with rest is worth a circulation check.

How Watches, Oximeters and Phones Read Your Pulse

These devices use a light and a sensor to detect blood-volume changes in skin.48PubMed Central. Current progress of photoplethysmography and SPO2 for health monitoring More blood absorbs more light, so each beat dims the light reaching the sensor.49PubMed Central. Recent advances in pulse oximetry A fingertip oximeter shines light through the finger to a sensor on the other side.50PubMed Central. Recent advances in pulse oximetry Watches and clinical monitors use this to report pulse rate and oxygen level.51PubMed Central. Current progress of photoplethysmography and SPO2 for health monitoring

Many wrist watches use green light because blood absorbs it strongly. The sensor on the underside of the watch measures how much light bounces back from the skin.

An oximeter finds oxygen level by using the fact that blood carrying oxygen and blood without it absorb different colors of light differently. It compares how much of two kinds of light passes through the finger and uses the ratio to estimate oxygen. The pulse matters because the device looks at the changing, pulsing part of the signal to isolate arterial blood.

A phone camera on a fingertip can estimate pulse from tiny brightness changes.52PubMed. Research on heart rate extraction method based on mobile phone video Some methods read pulse from video of the face without contact.53Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies. MobilePhys There are limits, though. In newborns, wrist sensors read less accurately than forehead ones because limbs get less blood just after birth.54PubMed Central. Comparing peripheral limb and forehead vital sign monitoring in newborn infants at birth Cold, narrowed vessels or movement can likewise weaken any limb reading.

For a reliable reading, keep still and warm. Wear the watch snug above the wrist bone. If a reading seems wrong, check by touch, and remember that a device rate does not show pulse strength the way fingers do.

How Doctors Test Leg Circulation

A handheld Doppler uses sound waves to hear blood flow.55PubMed Central. Ankle brachial index for the diagnosis of lower limb peripheral arterial disease In healthy adults, a front-of-ankle artery was never felt by touch but always found by Doppler.56PubMed. Palpation versus hand‑held Doppler for identifying lower‑limb peripheral arteries: Time‑efficiency and reliability in healthy adults So a pulse you can’t feel isn’t proof of no flow. A healthy artery tends to give a clear rhythmic sound with each beat, while a narrowed one can sound weaker or duller.

The ankle-brachial index (ABI) divides the highest ankle blood pressure by the arm blood pressure.57PubMed Central. Ankle-brachial index: more than a diagnostic test? It is the standard test for blocked leg arteries.58PubMed. Ankle-brachial index measured by palpation for the diagnosis of peripheral arterial disease A result of 0.9 to 1.4 is normal for adults, below 0.9 suggests narrowed arteries, and below 0.5 means dangerously low flow.59PubMed Central. Ankle-brachial index: more than a diagnostic test?

Each ankle has two arteries, and the higher pressure of the two is used so the result reflects the best flow reaching the foot. The arm pressure is typically the higher of the two arms, for the same reason.

At the appointment you lie flat and rest a few minutes. Cuffs go on your arms and ankles, and a Doppler probe with gel listens at each site. It is quick and painless.