Health & Fitness

CPR and First Response Essentials

Recognize cardiac arrest, push hard and fast, use an AED, clear a choking airway, and stop life-threatening bleeding.

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What you will learn about CPR and First Response Essentials

The 7-day sprint
  1. The First Thirty Seconds. Before any technique, you make the scene safe and decide one thing: is this person unresponsive and not breathing normally, which means cardiac arrest.
  2. Compressions That Actually Move Blood. A chest compression is a mechanical squeeze of the heart, and only depth, rate, full recoil, and near-continuous delivery turn that squeeze into blood flow to the brain.
  3. The AED Is the Treatment. Compressions buy time, but for a heart quivering in ventricular fibrillation the only fix is a shock, and the survival odds fall with every minute the defibrillator is not on the chest.
  4. Breaths, Barriers, and When Air Matters. Hands-only CPR is the right default for an untrained bystander with a collapsed adult, but breaths become important when the arrest started from a lack of oxygen.
  5. Children and Infants Are Not Small Adults. Pediatric arrest usually starts with a breathing problem, so breaths matter more, the force is scaled down, and infant technique changed in 2025.
  6. Choking: Back Blows First. A person who can cough forcefully is clearing their own airway, and a person who cannot gets repeated cycles of five back blows followed by five thrusts until the object comes out or they go unresponsive.
  7. The First Five Minutes of Any Emergency. One repeatable sequence covers every scene: make it safe, get help coming, then treat the fastest killers in order, which are catastrophic bleeding, airway, and breathing or circulation.
The 80/20: the 7 concepts that matter most
  • Recognize arrest in under ten seconds and call immediately
  • High-quality chest compressions
  • Early defibrillation
  • Delegate with names and run help in parallel
  • Breaths when the problem started as oxygen
  • Choking: cough first, then back blows, then thrusts
  • Stop life-threatening bleeding: pressure, packing, tourniquet
The core idea, explained like you are 5

CPR works because you are temporarily doing the heart's job by hand: squeezing the chest creates the pressure that pushes blood to the brain, that pressure disappears the instant you stop, and defibrillation is what actually restarts the heart.

Then the quiz and the ladder

10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.

Created Oct 22, 2026. No mistakes have been reported by learners.

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