CPR: A Complete Guide for Beginners
CPR — cardiopulmonary resuscitation — keeps blood and oxygen moving to the brain when someone’s heart has stopped, buying time until a defibrillator and emergency responders arrive. You don’t have to be perfect to make a difference. Doing something is dramatically better than doing nothing.
Reading about CPR builds awareness; hands-on training builds the muscle memory that performs under stress. We strongly recommend a certified CPR/AED course through the American Heart Association or American Red Cross. The steps below reflect the 2025 AHA guidelines.
Step 1 — Recognize cardiac arrest
If a person is unresponsive and not breathing normally (or only gasping), assume cardiac arrest. Tap them and shout. If there’s no normal response, act immediately.
Step 2 — Call 911 and get an AED
Call 911 or direct someone specific to call, and send someone for the nearest AED. If you’re alone with a phone, put it on speaker so the dispatcher can guide you while you start compressions.
Step 3 — Start chest compressions
This is the heart of CPR. For an adult:
- Hand placement: heel of one hand on the center of the chest (lower half of the breastbone), the other hand on top, fingers off the ribs.
- Rate: push hard and fast at 100 to 120 compressions per minute — about the beat of many upbeat songs.
- Depth: at least 2 inches, but no more than 2.4 inches, for an average adult.
- Recoil: let the chest rise completely between compressions, and minimize pauses.
For an adult who suddenly collapses, the 2025 AHA guidelines confirm that untrained or unconfident rescuers should do hands-only CPR — continuous chest compressions, no rescue breaths. It’s effective, and it removes the hesitation that costs lives.
Step 4 — Add rescue breaths (if trained)
Trained rescuers can add breaths using a 30:2 ratio — 30 compressions followed by 2 breaths — for a single rescuer. Each breath lasts about one second and should make the chest rise; avoid over-ventilating. For infants and children, rescue breaths are more important, and techniques differ — another reason hands-on training matters.
Step 5 — Use an AED as soon as it arrives
Turn the AED on and follow its voice prompts. Apply the pads, let it analyze, and deliver a shock if advised — then resume compressions immediately. CPR and defibrillation work together; the AED won’t shock a heart that doesn’t need it.
Keep going until help arrives
Continue cycles of compressions (and breaths, if trained) until EMS takes over, the person shows clear signs of life, or you’re physically unable to continue. If others are present, swap every couple of minutes to keep compressions strong.
Turn knowledge into readiness
Get certified, equip your team, and keep CPR and AED equipment on hand. We offer training resources, manikins, and AEDs from every major brand.
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Frequently asked questions
What is the correct CPR compression rate and depth?
For an average adult, push at 100 to 120 compressions per minute to a depth of at least 2 inches but no more than 2.4 inches, allowing full chest recoil between compressions.
What is the CPR ratio of compressions to breaths?
For a single trained rescuer performing CPR on an adult, the ratio is 30 compressions to 2 breaths. Untrained bystanders should perform hands-only CPR with continuous compressions and no breaths.
What is hands-only CPR?
Hands-only CPR is continuous chest compressions without rescue breaths. The 2025 AHA guidelines recommend it for untrained or unconfident bystanders responding to an adult who suddenly collapses.
Do I need to be certified to perform CPR?
No. Anyone can and should perform CPR in an emergency. Certification through the AHA or Red Cross is strongly recommended because hands-on practice builds the skill and confidence to act effectively under stress.
