What is the first step for an EMT to take in a suspected cardiac arrest situation?

In a suspected cardiac arrest situation, the first step an EMT should take is to check for a pulse. This step is crucial because it determines whether the patient is indeed in cardiac arrest, allowing the EMT to proceed with the appropriate actions based on the patient's condition. If no pulse is detected, the EMT can then initiate cardiopulmonary resuscitation (CPR) immediately and prepare to use an automated external defibrillator (AED) as soon as possible.

Calling for ALS backup is important, but it does not take priority over confirming the patient's status. Without first checking for a pulse, calling for backup could delay critical interventions that may save the patient’s life. Thus, assessing for a pulse is the foundational step that guides the EMT's next actions.