Certified Pediatric Emergency Nurse (CPEN) Practice Exam 2025 - Free CPEN Practice Questions and Study Guide

Epinephrine is a critical medication used in the management of anaphylaxis, and one of its hallmark physiological effects is the stimulation of the cardiovascular system, particularly the heart. When administered during an anaphylactic reaction, epinephrine acts as a sympathomimetic agent, causing an increase in heart rate, which is known as tachycardia. This effect is beneficial as it helps to improve circulation and blood flow, counteracting the severe hypotension and shock that can occur during an anaphylactic episode.

In addition to increasing heart rate, epinephrine also causes vasoconstriction, which can help to elevate blood pressure and improve perfusion to vital organs. The combined actions of increased heart rate and elevated blood pressure are crucial in managing the potentially life-threatening complications of anaphylaxis.

Understanding the physiological effects of epinephrine is essential for healthcare professionals, especially in emergency settings involving pediatric patients, where rapid recognition and treatment of anaphylaxis is vital for positive outcomes.