How To Perform CPR On An Adult | Steps That Matter

Guide / By

Adult CPR means pushing hard and fast in the center of the chest, using rescue breaths only if you’re trained and ready.

If an adult suddenly collapses, stops responding, and isn’t breathing normally, CPR buys time. It keeps blood moving to the brain and heart until emergency crews and an AED arrive. In that moment, simple beats fancy. You need a clear sequence, steady hands, and a pace you can hold.

This article walks you through adult CPR the way a bystander is most likely to use it: spot trouble, call for help, start compressions, and use an AED the second one shows up. If you’ve never taken a class, don’t freeze. Hands-only CPR is still far better than doing nothing.

What Adult CPR Is Trying To Do

CPR stands for cardiopulmonary resuscitation. For an unresponsive adult in cardiac arrest, chest compressions squeeze the heart between the breastbone and spine. That pressure can move some blood through the body until a shock, advanced care, or both restart an effective heartbeat.

You are not trying to “fix” the person on the floor by yourself. Your job is to keep going long enough to give them a shot. That means quick action matters more than perfect style.

  • Call emergency services right away.
  • Send someone to get an AED if one is nearby.
  • Start chest compressions if the person is not breathing or is only gasping.
  • Keep pauses short.
  • Swap with another rescuer every 2 minutes if you can.

How To Perform CPR On An Adult Step By Step

Check The Scene And The Person

Make sure the area is safe enough to enter. Traffic, live wires, fire, and unstable flooring can turn one victim into two. Then tap the person’s shoulders and shout. If there’s no response, check breathing. Gasping is not normal breathing.

Don’t spend a long time deciding. If the person is unresponsive and not breathing normally, act.

Call For Help And Get An AED

If other people are around, point to one person and give a direct instruction: “Call 911 now.” Point to another: “Bring the AED.” If you’re alone with a mobile phone, call emergency services on speaker so you can start CPR right away.

Public AEDs are common in airports, gyms, offices, schools, malls, and sports venues. If one is close, it can make a life-saving difference.

Position The Person

Lay the adult flat on their back on a firm surface. Kneel beside the chest. Soft beds and couches soak up force, which makes compressions weaker.

Place Your Hands Correctly

Put the heel of one hand in the center of the chest, on the lower half of the breastbone. Put your other hand on top. Interlock your fingers or lift them so they don’t press on the ribs. Stack your shoulders over your hands and lock your elbows.

Push Hard And Fast

Press straight down at least 2 inches deep and let the chest rise fully after each push. Aim for 100 to 120 compressions per minute. That is a brisk, steady beat, not a frantic one.

Count out loud if it helps you hold rhythm. Your arms will tire sooner than you think. That’s normal. Keep your body over your hands so your weight does more of the work.

Add Breaths Only If You’re Trained

If you have CPR training and feel ready, use cycles of 30 compressions and 2 breaths. Tilt the head back, lift the chin, pinch the nose, seal your mouth over theirs, and give 2 breaths that each last about 1 second. Watch for chest rise.

If you are not trained, or you’re not sure you can give effective breaths, stick with hands-only CPR. Fast, steady compressions are still the main job.

Use The AED As Soon As It Arrives

Turn it on and follow the voice prompts. Expose the chest and place the pads exactly where the diagrams show. Make sure no one is touching the person when the device analyzes or gives a shock. Then restart CPR right away when the AED tells you to.

The American Heart Association adult lay-rescuer algorithm puts the same priorities in the same order: activate emergency response, get an AED, start CPR, then follow AED prompts.

Adult CPR Numbers To Know

When stress hits, numbers blur fast. This table gives you the targets worth holding onto.

Part Of CPR What To Do What That Looks Like
Responsiveness Tap and shout No response means move fast
Breathing check Look for normal breathing Gasping does not count
Emergency call Call 911 or your local number Use speaker if you are alone
Compression location Center of the chest Lower half of the breastbone
Compression depth At least 2 inches Push straight down, then release fully
Compression rate 100 to 120 per minute Fast, even rhythm
Breath ratio 30 compressions, 2 breaths Only if trained and able
Pause length Keep interruptions short Get back on the chest fast
Rescuer switch Every 2 minutes if possible Change quickly to avoid a long pause
AED use Apply as soon as available Follow prompts, then resume CPR

What Most People Get Wrong

CPR looks simple from across the room. Up close, a few mistakes show up again and again.

  • Waiting too long to start. If the adult is unresponsive and not breathing normally, do not stand there counting seconds.
  • Pressing too softly. Shallow compressions do less work. You need real depth.
  • Going too slow. Slow compressions waste time and reduce blood flow.
  • Leaning on the chest. Let the chest come all the way back up after each push.
  • Stopping too often. Long breaks for breaths, pulse checks, or panic hurt the rhythm.
  • Delaying the AED. If one is available, get it on the chest fast.

The Red Cross adult CPR steps stress the same points: 100 to 120 compressions a minute, at least 2 inches deep, full chest recoil, 30:2 when breaths are given, and quick AED use.

Hands-Only CPR Vs CPR With Breaths

For most adult sudden collapses in public, hands-only CPR is the best fallback for an untrained bystander. It cuts out the part people hesitate over and gets compressions started sooner.

If you are trained, rescue breaths still matter, especially when lack of oxygen started the problem. Drowning, drug overdose, and some breathing emergencies fit that pattern. Even then, chest compressions stay front and center.

Situation Best Immediate Move Reason
Adult collapse, untrained rescuer Hands-only CPR Gets compressions started with less delay
Adult collapse, trained rescuer 30 compressions and 2 breaths Adds oxygen while keeping rhythm
AED arrives Turn it on and follow prompts Some rhythms need a shock fast
Second rescuer arrives Swap every 2 minutes Fresh compressions are usually deeper
Person starts moving or breathing normally Stop compressions and monitor You may no longer be treating cardiac arrest

When To Stop CPR

Keep going until one of these things happens:

  1. The person starts breathing normally or shows clear signs of life.
  2. An AED or emergency crew takes over.
  3. You are too exhausted to continue.
  4. The scene becomes unsafe.

If the person starts breathing, roll them onto their side if you can do so safely and keep watching them until help arrives.

Why Practice Still Matters

Reading the steps once is useful. Practicing them on a manikin is better. Real compressions are harder and more tiring than most people expect. A class lets you feel proper depth, pace, recoil, and hand placement before the pressure is real.

MedlinePlus CPR guidance notes that hands-only CPR is appropriate for teens and adults when an untrained rescuer is helping, while trained rescuers can add airway and breathing care. That split makes adult CPR easier to remember under stress: if you know less, start pressing; if you know more, add breaths.

What To Burn Into Memory

If you only remember one chain of action, make it this: unresponsive adult, no normal breathing, call for help, get the AED, push hard and fast in the center of the chest, and don’t stop unless the person wakes, trained help takes over, or the scene turns unsafe.

That’s the heart of How To Perform CPR On An Adult. It is not graceful. It is not gentle. It is steady, physical work done for one reason: to keep a person in the fight until the next layer of care arrives.

References & Sources