7 Signs Someone Needs CPR and How to Act on Each One

Most people who freeze during an emergency are not lacking courage. They are unsure what they are looking at. A person on the floor could be asleep, fainted, having a seizure, or in cardiac arrest, and the right response differs for each. The signs someone needs CPR are fewer and clearer than most people expect, and a few look-alike situations account for most of the hesitation.

Two findings drive the decision: the person does not respond, and they are not breathing normally. Everything else in this guide either confirms those two findings, explains how to act on them, or warns you early. Seven signs follow, each with the response that goes with it.

1. Unresponsiveness

Unresponsiveness is the first gate in the CPR decision process because the brain stops responding to the outside world when blood flow fails. A person who does not react to a shout or a firm shoulder tap is not simply resting. Either something has gone seriously wrong or they need immediate help to find out.

Imagine a coworker slumps forward at their desk. You say their name, then tap their shoulder firmly, and nothing changes: no eye opening, no groan, no movement. That is your trigger to act, not to wait and see.

Check that the scene is safe for you and the person.

Tap the shoulders firmly and shout, "Are you okay?"

If there is no response, call 911 or tell a specific bystander to call. Point at them and say, "You, call 911 and bring the AED."

Move straight to checking breathing.

The most common mistake is assuming the person is asleep or intoxicated and waiting to see whether they stir. That delay costs minutes. Someone who is truly asleep or drunk will respond to a loud voice and a firm tap; someone who does not respond needs help either way.

To measure this, time your drills. Track the seconds from "collapse" to the first responsiveness check and to the 911 call. In workplace practice sessions, both should happen within the first half minute, and the gap should shrink with repetition.

2. Not breathing or only gasping

This is the sign that, paired with unresponsiveness, tells you to start CPR. In the first minutes of cardiac arrest, many people make occasional gasping sounds called agonal breathing. It is a reflex of a failing brainstem, not effective breathing, and it moves almost no oxygen.

Suppose an unresponsive person on a gym floor makes an occasional snoring gasp every several seconds. Their chest barely rises. Bystanders say, "He's still breathing." He is not breathing normally, and this is the exact moment where hesitation does harm.

Look at the chest for no more than 10 seconds. Normal breathing is regular and visibly moves the chest. If you see no breathing, or only gasps, begin compressions immediately. For adults, the American Heart Association recommends compressions at 100 to 120 per minute, about 2 inches deep, allowing full chest recoil between compressions (verify against the current AHA guidelines, as of 2026).

The classic mistake is treating gasping as breathing and waiting for it to "settle." If you are unsure, treat it as not breathing. Another common worry is that CPR will hurt someone who did not need it. Hesitation is the bigger risk: a person who is unresponsive and not breathing normally has nothing to lose from compressions.

Measure how many trainees begin compressions within roughly 10 seconds of finding the person unresponsive in scenario practice, and note who stalls when gasping is part of the scenario.

3. No pulse (professional check)

A pulse check is a healthcare provider skill, and it is often misunderstood. Lay rescuers are taught to skip it because untrained people find pulses unreliably, and the search wastes time. Providers trained in Basic Life Support (BLS) check a pulse because they are practiced at it and can do it alongside the breathing check.

For example, a nurse trained in BLS finds an unresponsive patient. She places two fingers on the carotid artery at the side of the neck while watching the chest for breathing, all within a single assessment of up to 10 seconds. Doing both at once saves time.

Confirm unresponsiveness and activate the emergency response.

Feel the carotid pulse for no more than 10 seconds while scanning for breathing.

If there is no definite pulse, start CPR with compressions.

If you are not certain you feel a pulse, treat it as absent.

The pitfall is lingering. Providers sometimes keep searching for a faint pulse, and every extra second is a second without circulation. If you do not feel a definite pulse within 10 seconds, begin.

The misconception that everyone must find a pulse first is worth correcting for the general public: if you are not a trained provider, do not check one. Unresponsive and not breathing normally is enough.

In BLS skills testing, measure the check duration directly. A stopwatch on the instructor side makes it simple to confirm each provider stays at 10 seconds or less. Our BLS certification courses practice this timing until it becomes automatic.

4. Sudden collapse

An abrupt fall in someone who seemed fine a moment earlier is a classic presentation of sudden cardiac arrest. The heart's electrical system fails, often into a chaotic rhythm called ventricular fibrillation, and blood stops reaching the brain within seconds. Defibrillation with an automated external defibrillator (AED) is the treatment for that rhythm, which is why speed matters.

Imagine a runner who drops mid-jog at a park and does not move. Nobody saw it coming. Runners nearby may assume exhaustion or a faint, but a collapse with no response is treated as cardiac arrest until proven otherwise.

Act in parallel, not in sequence: call 911, send someone for the nearest AED, begin compressions, and attach the AED pads the moment the device arrives. Follow its voice prompts. It will only advise a shock if the rhythm calls for one.

The key distinction to keep straight is heart attack versus cardiac arrest. A heart attack is a circulation problem: a blocked artery, with the person awake and often reporting chest pain. Cardiac arrest is an electrical problem: the person is unresponsive and not breathing normally. A heart attack can lead to cardiac arrest, but they are not the same, and only the second calls for CPR.

Measure two intervals in drills: time to first compression and time to AED pads on. If your site owns an AED, or is considering one, our AED sales and training pair the equipment with hands-on practice.

5. Blue, gray, or pale skin and lips

Color change reflects low oxygen in the blood. Lips, gums, and nail beds may turn bluish, gray, or ashen. It supports the other signs but cannot stand alone, since cold, fainting, and other conditions also change skin color.

Consider a pool rescue. A swimmer is pulled from the water, and under the deck lights their lips look bluish. Color raises your concern, but the decision still rests on whether they respond and breathe normally.

Check in good light, and look at places where color shows best: inner lips, gums, and nail beds. Then combine it with the responsiveness and breathing checks from the first two strategies.

There are two pitfalls. The first is starting CPR on color alone, when the person is awake and breathing. The second is missing color change on darker skin tones, where bluish or gray shifts are subtler on the face and more visible in the lips, tongue, gums, and nail beds. Do not rely on the cheeks or forehead.

In scenario training, measure whether learners pair color with the other two checks correctly. A good result is a learner who mentions color aloud but still states the decision based on response and breathing.

6. Triggers like drowning, choking, and overdose

Some emergencies stop breathing first, and the heart follows as oxygen runs out. In these cases the arrest is respiratory in origin, which changes how CPR is delivered. Drowning, severe choking, and opioid overdose are the usual examples.

Imagine a diner who cannot speak, grasps their throat, and then becomes unresponsive. You lower them to the floor and call 911. Here, compressions plus rescue breaths matter because the problem is lack of oxygen, not a rhythm problem alone.

Call 911 and send for an AED.

Begin CPR. Where you are trained, give rescue breaths with compressions.

For choking, look in the mouth for a visible object and remove it only if you can see it. Never sweep blindly.

For a suspected opioid overdose, give naloxone if available while continuing CPR as directed by dispatch.

The common mistake is using hands-only CPR when the cause is respiratory. Hands-only CPR is appropriate for sudden collapse in adults, and it is far better than doing nothing, but drowning and overdose victims benefit from breaths. If you are untrained or unwilling to give breaths, compressions are still the right fallback.

To measure readiness, track which staff have completed the relevant courses: CPR, First Aid, and Water Safety. For lifeguards and aquatic staff, Lifeguard certification covers the water-specific response.

7. Warning signs before arrest

Not every cardiac emergency begins with a collapse. Chest pressure or tightness, cold sweats, shortness of breath, nausea, and pain spreading to the jaw or arm can appear before the heart stops. These are not signs that someone needs CPR yet, but they give you a window to prepare.

For example, imagine an employee tells a safety coordinator they have jaw pain and nausea and look clammy. The coordinator calls 911, keeps the employee seated and resting, and brings the AED to their side before anything worse happens.

Call 911 first. Keep the person calm and monitored, stay with them, and locate the AED so it is next to them. If they become unresponsive and stop breathing normally, you are already positioned to start compressions and apply pads.

The frequent error is driving the person to the hospital instead of calling 911. If the heart stops on the road, the driver is alone, and there is no AED. Emergency crews arrive with equipment and can begin treatment immediately.

Workplace coordinators can measure the percentage of staff who can state where the nearest AED is and the first three emergency steps. A short quiz at onboarding and again each year shows the gap. Our workplace safety training can be tailored to your site layout.

Start with two checks, then make them automatic

If you remember only two things, make them these: is the person unresponsive, and are they breathing normally? Those two checks drive the decision. Color, collapse, triggers, and warning signs add context, but they should never delay what those two findings tell you to do.

Reading about the steps helps, but practicing them on a manikin with an instructor is what makes them automatic under stress. Taylored Instruction offers American Red Cross and American Heart Association courses, including CPR, BLS, First Aid, and Lifeguarding, with instruction tailored to your setting.

Don't wait until an emergency happens. Get the life-saving certification you need today. Register for a CPR, First Aid, or Lifeguarding class and gain the confidence and skills to respond when it matters most.