If you are alone with an adult who collapses suddenly, what should you do first?

In a situation where an adult collapses suddenly, the appropriate first step is to call 9-1-1 before starting CPR. This action prioritizes alerting emergency services to send help, which is crucial for the restoration of normal heart function and survival.

Calling 9-1-1 effectively ensures that professional assistance is on the way while you prepare to administer CPR. If you were to delay this step and start CPR first, there could be a significant loss of valuable time before emergency services arrive, particularly if the victim requires advanced interventions.

It is also important to understand that while checking for responsiveness and signs of breathing are vital components of assessing the situation, they can be done quickly. However, the immediate call to emergency services is critical and should be done as soon as possible to maximize the chance for a favorable outcome for the victim. Following the initial call, if the victim is unresponsive and not breathing normally, CPR should then be started promptly to maintain blood circulation and oxygenation until further help arrives.