Every year, cardiac arrests happen in homes, workplaces, restaurants, and public spaces across the Midwest and throughout the country. When someone collapses suddenly, the minutes before emergency services arrive are critical. Hands only CPR, also called compression-only CPR, gives bystanders a straightforward, effective way to respond without the barrier of mouth-to-mouth breathing.
The American Heart Association recognizes hands only CPR as an appropriate response for adult sudden cardiac arrest witnessed by an untrained bystander. It removes hesitation, simplifies the process, and keeps blood circulating to the brain and vital organs until professional help arrives.
This guide walks you through the exact hands only CPR technique, step by step, so you can act with confidence if you ever face this situation. Whether you are a concerned parent, an employer preparing your team, a fitness professional, or someone who simply wants to be ready, this guide gives you a clear, actionable process to follow.
One important note before we begin: hands only CPR is intended for adult victims of sudden cardiac arrest. Children, infants, and drowning victims typically require conventional CPR with rescue breaths. If you want to be fully prepared for any scenario, formal CPR certification training covers all of these situations in depth. For now, let's walk through what to do when an adult collapses in front of you.
Step 1: Recognize the Emergency and Confirm It Is Safe to Help
Your instinct when someone collapses is to rush toward them. That instinct comes from a good place, but acting before you assess the scene can put both of you in danger. Taking five seconds to scan your surroundings is not hesitation. It is smart, trained behavior.
Before you approach, look for hazards. Is there oncoming traffic? Downed power lines? Smoke, fire, or structural instability? If the scene is unsafe, do not enter. Call 911 immediately and wait for trained emergency responders who have the equipment to manage those conditions.
Once you confirm the scene is safe, approach the person and check for responsiveness. Tap them firmly on both shoulders and shout clearly: "Are you okay?" Do this twice if needed. You are looking for any reaction: eye movement, a groan, pulling away. No response is your signal to move forward.
Now look for signs that CPR is actually needed. The person should be unresponsive, not breathing normally (gasping or agonal breathing does not count as normal breathing), and showing no signs of circulation. Do not attempt CPR on someone who is conscious, breathing normally, or has a detectable pulse. CPR on a person with a beating heart can cause harm.
A common mistake at this stage is rushing straight into compressions before confirming unresponsiveness or checking for hazards. It feels urgent, and it is urgent. But a quick, deliberate check takes only seconds and ensures your efforts are directed where they are needed.
Success indicator: You have confirmed the scene is safe, the person is unresponsive, and they are not breathing normally. You are ready to act.
Step 2: Call 911 and Get an AED
The moment you confirm this is a cardiac emergency, activating the emergency response system is your next move. Every second the heart is not pumping reduces survival odds, and EMS needs to be on the way while you work.
If you are alone, call 911 yourself immediately. Put the call on speaker so your hands are free and you can begin CPR while staying on the line. The dispatcher will guide you through the process verbally, confirm your location, and stay with you until help arrives. You do not need to hang up.
If there are bystanders nearby, delegate clearly. Point directly at a specific person and say, "You, call 911 right now." Vague instructions like "someone call 911" often result in everyone assuming someone else is handling it. Direct, specific commands cut through the chaos.
At the same time, send a second bystander to locate an AED. Automated external defibrillators are increasingly common in public spaces: offices, gyms, airports, schools, shopping centers, and sports facilities often have them mounted on walls or near reception areas. An AED combined with CPR significantly improves survival outcomes for out-of-hospital cardiac arrest, according to the American Heart Association.
Do not leave the victim unattended to search for an AED yourself unless you are the only person present and a device is confirmed to be very close by. Your compressions are keeping blood moving to the brain. That is your priority until the AED arrives or EMS takes over.
Success indicator: 911 is called, EMS is on the way, and someone is actively retrieving an AED while you prepare to begin compressions.
Step 3: Position the Victim and Yourself Correctly
Effective compressions depend on a solid foundation. If the victim or your body is poorly positioned, you will lose compression depth, fatigue faster, and reduce the effectiveness of everything that follows.
Place the victim flat on their back on a firm, flat surface. Hard floors are ideal. Avoid soft surfaces like mattresses or thick carpet whenever possible because they absorb the force of your compressions rather than transmitting it through the chest. If you cannot move the person to a harder surface, do the best you can. Imperfect CPR on a soft surface is far better than no CPR at all.
If the victim is face down, carefully roll them onto their back. Support the head and neck as you turn them to avoid unnecessary movement of the spine, especially if trauma is a possibility. One smooth, controlled roll is the goal.
Once the victim is on their back, kneel beside them at chest level. Position your knees roughly hip-width apart for a stable base. You want to be close enough to the victim to apply direct downward force without awkwardly reaching across their body.
Tilt the head back slightly and take a brief look at the mouth. If you see an obvious obstruction, you can carefully remove it. Do not perform a blind finger sweep into the mouth. You risk pushing an obstruction deeper or injuring yourself.
Your positioning matters as much as theirs. Knees hip-width apart, body upright, and shoulders directly over the chest. This alignment lets you use your body weight to drive compressions rather than relying purely on arm strength, which will exhaust you within minutes.
Why this matters: Correct positioning allows you to deliver effective compressions consistently without fatiguing quickly or losing the depth needed to keep blood circulating.
Step 4: Find the Correct Hand Placement on the Chest
Hand placement is one of the most important technical elements of the hands only CPR technique. Compressions in the wrong location are less effective and can cause unnecessary injury.
Place the heel of one hand on the center of the chest, directly on the lower half of the breastbone (the sternum). The heel of your hand is the firm, bony base of your palm, not your fingers or the middle of your palm. This is the contact point that will transfer force directly to the sternum.
Place your second hand on top of the first and interlace your fingers together. Once your fingers are interlaced, lift them slightly so only the heel of your bottom hand is making contact with the chest. This keeps your fingers from pressing down on the ribs, which reduces the risk of rib fractures and ensures your force is directed through the sternum where it needs to go.
Now straighten your arms fully and position your shoulders directly over your hands. This is the locked-arm position that lets you compress using your upper body weight rather than bending and extending at the elbows.
Where not to place your hands: Avoid placing hands on the ribs on either side of the sternum. Avoid the very bottom tip of the sternum, called the xiphoid process, which can fracture and cause internal injury. Avoid the upper abdomen entirely.
A common mistake is placing hands too high, too low, or slightly off-center. This reduces the effectiveness of each compression and increases the risk of injury to the victim. If you are unsure, find the center of the chest and aim for the lower half of the breastbone. That is your landmark.
Success indicator: The heel of your bottom hand is centered on the lower half of the sternum, your fingers are interlaced and lifted, and your arms are straight with shoulders stacked directly above your hands.
Step 5: Perform Chest Compressions at the Right Depth and Rate
This is the core of the hands only CPR technique. Everything up to this point has prepared you to deliver compressions that actually move blood. Now it is time to push.
Push hard and fast. The American Heart Association guidelines recommend compressing the chest at least 2 inches deep but no more than 2.4 inches for adults. That is a meaningful amount of force. Many bystanders compress too shallowly because it feels aggressive. Effective compressions require real effort, and that is exactly what the situation calls for.
The target rate is 100 to 120 compressions per minute. If that number is hard to visualize, think of the song "Stayin' Alive" by the Bee Gees. The beat of that song falls right in the middle of that range, and the American Heart Association has actually endorsed it as a memory aid for compression rate. Humming it silently while you work can help you stay on rhythm.
Between each compression, allow the chest to fully recoil. This means letting the chest rise completely back to its natural position before you compress again. Do not lean on the chest or let your weight rest on the sternum between compressions. Full recoil is critical because it allows the heart to refill with blood, making each compression more effective at circulating that blood to the brain and organs.
Keep compressions continuous. Minimize any interruptions to no more than 10 seconds. Every pause in compressions is a pause in blood flow, and the brain begins to suffer quickly without circulation.
CPR is physically demanding. If you become fatigued, ask another bystander to take over compressions. Switching every two minutes is a good rhythm that keeps compression quality high. When you switch, make the transition as fast as possible to minimize the interruption.
Success indicator: You can feel the chest compressing to the correct depth, the rate feels fast and rhythmic, and the chest is fully rising between compressions.
Step 6: Use the AED as Soon as It Arrives
When the AED arrives, use it immediately. Do not wait, and do not let uncertainty about the device slow you down. AEDs are specifically designed for public use by untrained bystanders. Every device provides clear voice prompts and visual diagrams that walk you through each step.
Turn the AED on as soon as you have it in hand. Some devices power on automatically when you open the case. Once it is on, follow the prompts. The device will tell you exactly what to do.
Attach the pads to the victim's bare chest as shown in the diagrams printed directly on the pads. One pad goes below the right collarbone. The other goes on the left side of the chest, below the armpit. Make sure the skin is dry before applying the pads. If the victim's chest is wet, quickly dry it off. If there is excessive chest hair preventing good pad contact, some AED kits include a razor for this purpose.
When the AED begins analyzing the heart rhythm, make sure no one is touching the victim. Movement or contact can interfere with the analysis. Announce clearly: "Everyone stand clear."
If the AED advises a shock, confirm that everyone is clear, then press the shock button. Immediately after the shock is delivered, resume compressions. Do not pause to check for a pulse. The AED will prompt you when to stop for the next analysis.
If the AED advises no shock, continue compressions and follow the device's prompts. Not every cardiac arrest involves a shockable rhythm, and the AED is designed to recognize this.
Hands only CPR keeps blood moving to the brain and keeps the victim viable until the AED is ready to analyze and potentially restore a normal heart rhythm. The two work together. Neither replaces the other.
Step 7: Continue Until Help Arrives or the Victim Recovers
Once you have started CPR and the AED is in use, your job is to maintain the effort. This is often the hardest part, not technically, but physically and emotionally.
Keep performing compressions until one of the following happens: EMS personnel arrive and take over, the AED advises you to stop, the victim shows obvious signs of life such as normal breathing or purposeful movement, or you are physically unable to continue. These are the only reasons to stop.
Do not stop to check for a pulse repeatedly. Pulse checks interrupt blood flow, and without training and experience, they are often inaccurate under stress. Trust the process and keep compressing.
If the victim begins breathing normally on their own, stop compressions and roll them gently onto their side into the recovery position. This keeps the airway open and prevents choking if they vomit. Continue monitoring them closely until EMS arrives.
While you work, keep the surrounding area clear. Ask bystanders to step back and give you space. Reassure them that help is on the way. This also helps manage the emotional energy in the space, which can become chaotic quickly.
When EMS arrives, give them a clear, brief handoff. Tell them how long ago the person collapsed, approximately how many compressions you have delivered, and whether an AED was used and whether a shock was advised. This information helps paramedics make fast decisions about next steps.
Finally, acknowledge that performing CPR is physically and emotionally demanding. It is normal to feel shaken, exhausted, or distressed afterward, regardless of the outcome. If you need support after the event, seek it. What you did mattered.
Putting It All Together: Your Chain of Action
The hands only CPR technique is not complicated, but it does require you to move through a clear sequence under pressure. The steps covered in this guide form a chain of action: recognize the emergency, call 911, position correctly, place hands properly, compress at the right depth and rate, use an AED, and continue until help arrives.
Reading through these steps is a valuable starting point. But practicing them in a real training environment builds the muscle memory and confidence that reading alone cannot fully provide. When adrenaline is high and someone's life is on the line, trained instinct takes over where memory leaves off.
Formal CPR certification through programs like Heartsaver CPR AED or BLS Provider training gives you hands-on practice with feedback from a certified instructor. You learn not just the steps but how compressions actually feel at the right depth, how to manage fatigue, and how to coordinate with bystanders. That kind of preparation is what separates hesitation from action.
Hands only CPR is an important skill for anyone. For healthcare professionals, childcare providers, workplace safety teams, and first responders, full CPR certification covering all victim types and scenarios is the standard of care.
Midwest CPR Center offers certification courses for individuals, healthcare teams, employers, and community groups throughout the region. Whether you are getting certified for the first time or renewing your credentials, trained instruction makes the difference when every second counts.
Don't wait until an emergency happens. Equip yourself and your team with life-saving skills today. Schedule your CPR certification class now and gain the confidence to respond when it matters most.