Should CPR Be Performed When a Patient Is Unconscious and Unresponsive?

Everyone · Explainer · Updated October 1, 2026 · LearnLife Editorial

What is CPR and when should it be performed?

Cardiopulmonary resuscitation (CPR) is an emergency procedure used to restart or maintain the heart and lung function of someone who has stopped breathing or whose heart has stopped beating effectively. In simple terms, CPR combines chest compressions—pressing hard on the chest to mimic heartbeats—and sometimes rescue breaths to keep oxygen-rich blood circulating through the body.

You should perform CPR when you find a person who is unconscious and unresponsive, especially if they are not breathing or are only gasping. Being unconscious means the person does not respond to shaking or speaking loudly; unresponsive means they show no signs of awareness or movement. If, after checking, you find they are not breathing normally, immediate CPR is needed to preserve life.

For example, if you are at a park and someone suddenly collapses, lying motionless without any response, you should quickly assess their breathing. If they are not breathing or only gasping weakly, start CPR while calling 911 or asking someone else to do so.

How does CPR work? A step-by-step example

Understanding each step of CPR helps build confidence in delivering it correctly. Imagine you see someone collapse who is unconscious and unresponsive. Here is what you do:

1. Check the scene for safety. Make sure you and the victim are not in danger, like traffic or fire.
2. Tap and shout. Gently tap the person’s shoulder and loudly ask, “Are you OK?” No response means unresponsive.
3. Call 911 or ask a bystander to call. Time is critical.
4. Check breathing for no more than 10 seconds. Look for chest rise, listen for breath sounds, and feel for breath on your cheek.
5. If not breathing normally (only gasping or no breathing), start CPR immediately.

Start chest compressions by placing the heel of one hand on the center of the chest between the nipples, the other hand on top, and press straight down about 2 inches deep. Compress at a rate of 100-120 per minute, about the tempo of the song “Stayin’ Alive.” After 30 compressions, if trained and able, give 2 rescue breaths by tilting the head back, lifting the chin, and breathing into the person’s mouth until you see the chest rise. Continue this cycle until help arrives or the person starts breathing.

For example, if you find no one else, call 911 yourself, then start 30 compressions and 2 breaths repeatedly. This keeps blood flowing to vital organs, buying time before advanced care.

Why is performing CPR important for everyone to know?

Knowing CPR equips you to save lives in emergencies. Cardiac arrest—the sudden stopping of the heart—is a leading cause of death outside hospitals. When the heart stops, the brain and organs quickly lose oxygen, causing brain damage in minutes.

Performing CPR immediately preserves blood flow and oxygen delivery. Even simple chest compressions can double or triple survival chances. Waiting for emergency responders without acting often means the person’s chance of survival diminishes rapidly.

This importance applies to everyone because cardiac arrest can happen anywhere—at home, work, school, or public places. Bystanders trained or not can make a critical difference. Hands-only CPR, which uses chest compressions without rescue breaths, is recommended for untrained people and is easy to learn.

For example, if a coworker collapses at work and you start CPR immediately, you provide vital support until paramedics arrive. This timely action can prevent permanent brain damage or death.

How do you decide if CPR is needed for an unconscious person?

Not every unconscious person needs CPR. Here is how to decide carefully:

1. Assess responsiveness: Gently shake the person and say loudly, “Are you OK?”
2. Check breathing: Look, listen, and feel for no more than 10 seconds.
3. Signs CPR is needed: No response and no normal breathing (only gasping or no breaths).
4. If breathing is normal: Do not start CPR. Instead, place the person in the recovery position—a side-lying posture that keeps the airway open and prevents choking—and call for help.
5. If uncertain: When in doubt, start CPR. It is better to act than hesitate.

For example, if you find someone unconscious but breathing normally, monitor them closely and wait for emergency responders. If breathing is absent, start CPR immediately.

What other terms related to CPR should you know?

Understanding related terms helps clarify when and how to act:

• Hands-only CPR: Chest compressions without rescue breaths, recommended for untrained rescuers or when rescue breaths are unsafe.
• Chest compressions: Pressing down on the chest to mimic heartbeats and keep blood flowing.
• Rescue breaths: Breaths given mouth-to-mouth or with a barrier device during CPR to supply oxygen.
• Defibrillation: Using an automated external defibrillator (AED) to deliver an electric shock to restart the heart.
• First aid: Broad emergency care for injuries or illnesses, including CPR as one part.
• Recovery position: Placing an unconscious but breathing person on their side to keep the airway clear.

Confusing these terms can cause hesitation or incorrect response. Knowing them improves preparedness.

For instance, a bystander may hesitate to give breaths but can safely perform hands-only CPR until help arrives. Using an AED with simple voice prompts is another powerful step after CPR starts.

What steps should you take if you find someone unconscious and unresponsive?

Here is a clear, practical checklist you can follow:

1. Ensure the area is safe for you and the victim.
2. Check for responsiveness by tapping and speaking.
3. Call 911 immediately or ask a nearby person to call.
4. Check breathing by looking for chest movement, listening, and feeling for breath.
5. If no normal breathing, start CPR with chest compressions.
6. Use an AED if available as soon as possible, following its instructions.
7. Continue CPR and AED use until emergency personnel arrive, the person starts breathing normally, or you are physically unable to continue.
8. If the person starts breathing but remains unconscious, place them in the recovery position and monitor breathing.

For example, if a family member collapses at home, call 911, start CPR, and use an AED if you have one nearby. Keep calm and follow the steps above.

What are the risks of performing CPR incorrectly, and how can you minimize them?

Incorrect CPR can reduce its effectiveness or cause injuries like broken ribs, bruises, or damage to internal organs. However, these risks are generally minor compared to the risk of death if CPR is not done.

Common mistakes include compressing too shallowly, too slowly, or at the wrong location on the chest. Compressing too deeply or too forcefully can cause rib fractures, but this is acceptable when saving a life.

To minimize errors:

• Press hard and fast in the center of the chest.
• Aim for about 2 inches deep for adults.
• Keep a steady rhythm of 100-120 compressions per minute.
• Avoid interruptions longer than 10 seconds.
• Take a CPR course for hands-on practice.

If you are unsure, emergency dispatchers can guide you through CPR steps over the phone.

For example, if you press too lightly, blood flow may be insufficient. If you press too hard, ribs might break, but this is a risk worth taking to save the person's life.

What should you do after performing CPR?

After performing CPR, continue to monitor the person’s condition closely:

• Check if they start breathing normally.
• If they do, place them in the recovery position.
• Keep them warm and comfortable.
• Do not give food or drink.
• Stay with them until emergency responders arrive.
• Provide responders with as much information as possible about the event and CPR performed.

If the person regains consciousness, reassure them and encourage rest. Even if they appear fine, medical evaluation is necessary since the underlying cause needs treatment.

For example, after a stranger revives from cardiac arrest, stay calm, keep them safe, and relay important details to paramedics.

Frequently asked questions

Should CPR be performed on an unconscious person who is still breathing?

No, CPR is not recommended if the unconscious person is breathing normally. Instead, place them in the recovery position and call emergency services. CPR is reserved for those who are unresponsive and not breathing or breathing abnormally.

How do I perform hands-only CPR if I am not trained?

To perform hands-only CPR, place your hands in the center of the chest and press hard and fast at a rate of 100-120 compressions per minute. Continue until help arrives or the person starts breathing normally. Avoid rescue breaths if you are untrained or uncomfortable.

Can CPR be performed on a child or infant the same way as on an adult?

CPR for children and infants differs in compression depth, rate, and technique. For example, compressions are shallower and breaths gentler. Training courses provide these details. If you are untrained, hands-only CPR focusing on chest compressions is still helpful.

When should CPR be stopped once started?

CPR should continue until emergency medical personnel arrive and take over, the person shows signs of recovery such as breathing normally, or you become too exhausted to continue. Using an AED promptly also helps guide when to stop.

Can performing CPR cause harm to someone who might not need it?

While CPR can cause injuries like broken ribs, these risks are minor compared to the potential to save a life. If you have confirmed the person is unresponsive and not breathing normally, performing CPR is necessary and justified.