What is a primary effect of epinephrine in CPR?

Epinephrine is primarily used in cardiopulmonary resuscitation (CPR) due to its potent vasopressor effects. As a vasopressor, epinephrine constricts blood vessels, which increases systemic vascular resistance and consequently elevates blood pressure. This is critical during CPR as it improves coronary and cerebral perfusion pressure, thereby enhancing the chances of restoring a viable cardiac rhythm. The increased perfusion to vital organs, particularly the heart and brain, is essential for maintaining function during a cardiac arrest situation.

In addition to its role as a vasopressor, epinephrine also has other physiological effects, such as increasing heart rate and improving myocardial contractility, but the primary goal in emergency settings, particularly in the context of CPR, is to ensure adequate blood flow to vital organs. Therefore, its classification as a vasopressor is crucial in the context of CPR protocols and outcome improvement.