Cardiopulmonary resuscitation, or CPR, is one of the most important emergency skills a person can learn. It’s used when someone’s heart stops beating or they stop breathing. In those moments, oxygen stops reaching the brain and vital organs, and within a few minutes, permanent damage or death can occur. CPR acts as a temporary life-support system, keeping blood and oxygen moving until professional medical help arrives.Here’s the thing: CPR doesn’t restart the heart in most cases. What it does is buy time. It preserves brain function and increases the chances that advanced care like defibrillation or emergency medication will work.Let’s break it down in a practical, step-by-step way.First, recognize the emergency. A person who needs CPR will be unresponsive. They won’t respond when you tap them or call out loudly. Their breathing may be absent or abnormal, like gasping or irregular breaths. This is called agonal breathing and should not be mistaken for normal breathing. If someone is unconscious and not breathing properly, assume cardiac arrest and act immediately.Before starting CPR, ensure the scene is safe. There’s no point becoming a second victim. Once it’s safe, check responsiveness by tapping the person and asking loudly, “Are you okay?” If there’s no response, call for help. If others are around, ask someone specific to call emergency services and bring an AED, which is an automated external defibrillator. In India, you would dial 108 or 112 for emergency services. If you’re alone, call first and put your phone on speaker so you can begin CPR right away.Now comes the core of CPR: chest compressions.Place the person flat on their back on a firm surface. Kneel beside their chest. Put the heel of one hand on the center of the chest, on the lower half of the breastbone (sternum). Place your other hand on top and interlock your fingers. Keep your arms straight and position your shoulders directly over your hands.Push hard and fast. This is critical. The depth should be about 5 to 6 centimeters (around 2 inches) in adults. The rate should be 100 to 120 compressions per minute. A helpful way to maintain rhythm is to follow the beat of songs like “Stayin’ Alive” by the Bee Gees. After each compression, allow the chest to fully recoil before pressing again. Don’t lean on the chest between compressions.Compression quality matters more than anything else. Weak or slow compressions are far less effective. You may feel resistance or even hear a cracking sound in some cases, especially in older individuals. While that can be unsettling, it’s better to continue effective compressions than to stop. Saving a life takes priority.If you are trained and willing, you can combine compressions with rescue breaths. The standard ratio is 30 compressions followed by 2 breaths.To give rescue breaths, first open the airway using the head-tilt, chin-lift technique. Place one hand on the forehead and gently tilt the head back. Use your other hand to lift the chin upward. Pinch the nose shut, take a normal breath, and seal your mouth over the person’s mouth. Give one breath lasting about one second and watch for the chest to rise. Then give a second breath.If the chest does not rise, reposition the head and try again. Avoid giving too much air or blowing too forcefully, as that can push air into the stomach instead of the lungs.That said, if you’re not trained or uncomfortable giving breaths, hands-only CPR is absolutely acceptable and recommended. Just continue chest compressions without stopping.Now let’s talk about the AED, because it can dramatically improve survival chances. An AED is a portable device that analyzes the heart rhythm and can deliver a shock if needed. It’s designed for public use and gives clear voice instructions.When an AED is available, turn it on immediately. Expose the chest and attach the pads as shown in the diagrams on the pads. Usually, one pad goes on the upper right chest and the other on the lower left side. Make sure no one is touching the person while the AED analyzes the rhythm. If a shock is advised, ensure everyone is clear and press the shock button. Then resume CPR immediately after the shock.CPR should be continued until one of the following happens: the person starts breathing normally, trained medical personnel take over, an AED instructs you to stop, or you are physically unable to continue.There are some variations in CPR depending on age. For children and infants, the technique is slightly different because their bodies are smaller and more delicate.For children (1 year to puberty), compress the chest about one-third the depth of the chest, which is roughly 5 cm. You can use one or two hands depending on the child’s size. The compression rate remains the same, 100 to 120 per minute.For infants (under 1 year), use two fingers in the center of the chest just below the nipple line. Compress about 4 cm deep. If there are two rescuers, a two-thumb encircling technique is preferred, where both thumbs press on the chest while the hands support the back.In both children and infants, rescue breaths are more important than in adults because cardiac arrest often results from breathing problems. So if you’re trained, include breaths.Another key point is early action. Every minute without CPR reduces survival chances by about 7 to 10 percent. That’s a steep drop. Immediate CPR can double or even triple the chances of survival.Despite this, many people hesitate to perform CPR. Common reasons include fear of doing it wrong, causing injury, or legal concerns. In reality, doing something is far better than doing nothing. Many regions, including India, have Good Samaritan laws that protect people who provide emergency assistance in good faith.It’s also worth noting situations where CPR may not be appropriate, such as when a person has a valid Do Not Resuscitate (DNR) order or shows clear signs of irreversible death like rigor mortis. But in most emergency scenarios outside a hospital, if someone is unresponsive and not breathing, start CPR.Training makes a big difference. While this guide gives a solid understanding, hands-on practice helps you develop proper technique and confidence. Organizations like the Red Cross and various hospitals offer certified CPR training courses.To sum it up, CPR is about maintaining circulation and oxygenation during cardiac arrest. Recognize the signs quickly, call for help, start strong chest compressions, use an AED if available, and continue until help arrives. It’s a simple sequence, but in real life, it can mean the difference between life and death.Knowing CPR turns a bystander into a potential lifesaver. In an emergency, that knowledge becomes action, and that action can save someone’s life.
