Red Cross Advanced Life Support (ALS) Practice Exam

The correct initial dose of epinephrine during cardiac arrest is 1 mg. This dosage is based on current advanced life support guidelines, which specify that the administration of epinephrine should be at this amount every 3 to 5 minutes during the resuscitation efforts.

Epinephrine acts as a vasopressor, meaning it helps to increase blood flow to vital organs by constricting blood vessels, which is critical in the setting of cardiac arrest where circulation is severely compromised. The 1 mg dose is effective for stimulating the heart and enhancing the likelihood of achieving return of spontaneous circulation (ROSC).

While there are other dosages mentioned, they do not align with established protocols for initial epinephrine administration in this context. Understanding the importance of the correct dosage and its timing is crucial for effective resuscitation strategies during cardiac emergencies.