BLS Study Guide 2026

Immediately after delivering a shock with an AED, the rescuer should resume chest compressions without delay. There should be no pause to check for a pulse or rhythm, as early resumption of compressions is critical to maintain blood flow to the brain and heart. The AED will re-analyze the rhythm after two minutes of CPR.

In emergency situations involving an adult patient who is unconscious, unresponsive, or otherwise unable to give explicit consent, healthcare providers operate under the principle of implied consent. It is assumed that the patient would consent to life-saving treatment if they were able to communicate. This allows for immediate, critical care without delay.

Whole grapes are round, slippery, and sized to fit a child's airway exactly, making them one of the most common choking hazards for young children.

Emergency medical providers can provide treatment without explicit consent when a person is unconscious or unresponsive, based on the principle of implied consent. In such critical situations, it is presumed that the person would want to receive life-saving care. This allows for immediate intervention to preserve life and prevent further harm.

Gasping (agonal breathing) combined with unresponsiveness are key indicators of cardiac arrest, signaling that the person's heart has stopped or is failing, and they are not breathing effectively. Immediate initiation of BLS, including chest compressions, is necessary in this critical situation. Recognizing these signs promptly is vital for patient survival.

Rescuers should switch roles approximately every 2 minutes (5 cycles of 30:2) to prevent compressor fatigue and maintain high-quality compressions.