PALS Practice Test 2025 – Comprehensive All-in-One Guide to Master Pediatric Advanced Life Support!

In pediatric cardiac arrest, asystole and pulseless electrical activity (PEA) are indeed the two most common initial rhythms observed.

Asystole represents a complete cessation of electrical activity in the heart, which means there are no discernible heartbeats or cardiac output. This is a critical situation that indicates the heart is no longer functioning in a way that can support circulation.

On the other hand, pulseless electrical activity refers to the presence of organized electrical activity on the electrocardiogram without an effective mechanical response that produces a pulse. This can occur due to various underlying factors, such as hypoxia, metabolic imbalances, or hypovolemia, leading to inadequate circulation despite some electrical activity.

Recognizing these two rhythms is essential in pediatric advanced life support since they guide the resuscitation efforts, including the initiation of cardiopulmonary resuscitation (CPR) and the administration of medications. Quick identification and appropriate response to these rhythms can significantly impact outcomes for pediatric patients in cardiac arrest.

In contrast, ventricular fibrillation, sinus bradycardia, tachycardia, and atrial arrhythmias are not the most common initial rhythms in the pediatric population facing cardiac arrest scenarios.