What Are Common CPR Mistakes?

​Cardiopulmonary resuscitation (CPR) is one of the most important emergency skills anyone can learn. When performed correctly, CPR can double or even triple a person’s chance of survival after cardiac arrest. However, in real emergencies, even trained rescuers can make mistakes that reduce the effectiveness of CPR. Understanding these common CPR mistakes can help you respond more confidently and improve outcomes when every second counts.

Not Calling 9-1-1 Immediately

​One of the most critical mistakes happens before CPR even begins: delaying activation of emergency services. In a cardiac arrest situation, time is the most important factor. Some people hesitate because they are unsure whether the situation is “serious enough” or they think the person may recover on their own.

The correct action is easy: if someone is unresponsive and not breathing normally, call 911 immediately (or instruct someone else to do so while you begin CPR). Early emergency response activation ensures that advanced care and defibrillation are on the way as soon as possible.

not Starting CPR CompressionS QUICKLY ENOUGH

​Another common mistake is hesitation. Many bystanders freeze due to panic, fear of causing harm, or uncertainty about technique. However, in cardiac arrest, doing something is almost always better than doing nothing.

High-quality CPR should begin within seconds of confirming unresponsiveness and abnormal breathing. Delays in starting compressions significantly reduce survival rates because the brain and heart are not receiving oxygenated blood.

Incorrect hand placement

​Proper hand placement is essential for effective chest compressions. A frequent error is placing hands too high, too low, or off-center on the chest. The correct position for adult CPR is the center of the chest on the lower half of the sternum.

Incorrect placement can reduce blood flow or increase the risk of injury. In training courses such as those offered by Help-A-Heart CPR, LLC, students practice proper positioning repeatedly to build muscle memory.

Not compressing deep enough

​Shallow compressions are one of the most common CPR mistakes. If compressions are not deep enough, the heart is not effectively pumping blood to the brain and vital organs.

For adults, compressions should be at least 2 inches deep. For children and infants, the depth is slightly less but still requires firm, consistent pressure. Too often, rescuers become fatigued or hesitant and fail to maintain adequate depth.

Compressing too slowly or too quickly

​CPR requires a specific rhythm: 100–120 compressions per minute. Many rescuers unknowingly compress too slowly or too fast. A slow rate does not generate enough blood flow, while an overly fast rate reduces the heart’s ability to refill between compressions.

Not using an aed when available

​An Automated External Defibrillator (AED) is one of the most powerful tools in cardiac arrest survival, yet many people hesitate to use it. Some fear they might “do something wrong” or worry about safety.

AEDs are designed to be simple and safe. The device provides clear voice instructions and only delivers a shock when needed. Delaying or avoiding AED use is a serious mistake that can reduce survival chances.

Final thoughts

​CPR is a physically and emotionally demanding skill, and mistakes can happen—even among trained professionals. However, most errors are preventable with proper training and regular practice. The most important takeaway is this: imperfect CPR is still better than no CPR.
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Hands-on training through certified programs, such as those offered at Help-A-Heart CPR, LLC, helps build confidence and muscle memory so that in a real emergency, your actions are quick, effective, and potentially life-saving.