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How long should compressions be sustained during CPR?

April 5, 2026

Quick Answer

Compressions should be sustained for 30 seconds during CPR, with 15 seconds of chest compressions followed by 2 breaths.

CPR Technique

The American Heart Association (AHA) recommends that chest compressions in CPR be sustained for 30 seconds, with a ratio of 30:2. This means that 30 seconds of chest compressions should be followed by 2 breaths, which is the standard ratio for adults. It’s essential to maintain a consistent rate of 100-120 compressions per minute to ensure adequate blood circulation. The compressions should be at least 2 inches deep, with the rescuer’s hands positioned in the center of the chest, one on top of the other.

Importance of Compression Depth

The depth of chest compressions is crucial for effective CPR. Compressions that are too shallow may not be sufficient to generate adequate blood flow, while compressions that are too deep may cause damage to the ribcage and internal organs. The AHA recommends that chest compressions be at least 2 inches deep for adults, with a maximum compression depth of 2.4 inches. It’s also essential to avoid over-compressing, as this can lead to a rapid heart rate and decreased blood pressure.

Practice and Training

To ensure that CPR is performed effectively, it’s essential to practice and train regularly. The AHA recommends that healthcare professionals and laypersons receive regular training in CPR, including the use of an automated external defibrillator (AED). Training should include the proper technique for chest compressions, as well as the use of an AED to treat cardiac arrest. By practicing and training regularly, rescuers can ensure that they are prepared to respond to cardiac emergencies and provide effective care.

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