Advanced Cardiovascular Life Support (ACLS) Practice Exam 2025 - Free ACLS Practice Questions and Study Guide

Initiating cardiopulmonary resuscitation (CPR) immediately is critical in the event of a witnessed cardiac arrest because it significantly increases the chances of survival and recovery for the patient. CPR helps maintain vital blood flow to the heart and brain until emergency medical services can take over. It is essential to start CPR without delay, ideally within the first few minutes of the arrest, as the absence of effective circulation can lead to brain death within a few minutes.

Starting CPR and simultaneously calling emergency services ensures that advanced medical help is on the way while the heart is being supported through chest compressions and rescue breaths if trained to do so. This coordinated approach maximizes the chances of restoring spontaneous circulation and achieving a favorable outcome for the individual in cardiac arrest.

Checking for responsiveness for 10 seconds can lead to a critical delay in the initiation of resuscitation efforts. It's important to act swiftly. While manual ventilation and medication administration are important aspects of advanced care, they should follow the initiation of CPR and the establishment of a proper airway. Addressing the immediate need for circulation is the priority when faced with a witnessed cardiac arrest.