How long does it take to complete a cycle of 3 chest compressions followed by 1 breath?

Completing a cycle of 3 chest compressions followed by 1 breath involves timing that aligns with the guidelines for CPR (Cardiopulmonary Resuscitation). When performing CPR, it is recommended to administer each compression at a rate of about 100 to 120 compressions per minute. This translates to approximately 2 compressions per second. Given that 3 compressions would take approximately 1.5 seconds, the time taken for the next action—a single rescue breath—typically lasts about 1 second.

Therefore, when you sum up the duration for 3 compressions (1.5 seconds) and the time to deliver 1 breath (approximately 1 second), the total would be around 2.5 seconds on average. For simplicity, and based on the choices provided, rounding this duration aligns closely with 2 seconds as the most accurate option provided. This reflects best practice in CPR in terms of efficiency and effectiveness in delivering assistance during a cardiac emergency.