Emergency medicine updates: Cardiac arrest medications.

INTRODUCTION: Cardiac arrest is a serious condition frequently managed in the emergency department (ED). Medications are a component of cardiac arrest management.

OBJECTIVE: This paper evaluates key evidence-based updates concerning medications used for patients in cardiac arrest.

DISCUSSION: Several medications have been evaluated for use in cardiac arrest. Routes of administration may include intravenous (IV) and intraosseous (IO). IV administration is recommended, though if an attempt at IV access is unsuccessful, IO access can be utilized. Epinephrine is a core component of guidelines, which recommend 1 mg in those with shockable rhythms if initial CPR and defibrillation are unsuccessful, while in nonshockable rhythms, guidelines recommend that epinephrine 1 mg be administered as soon as feasible. While epinephrine may improve rates of ROSC, it is not associated with improved survival with a favorable neurologic outcome. Evidence suggests the combination of vasopressin, steroids, and epinephrine may improve ROSC among those with in-hospital cardiac arrest, but there is no improvement in survival to discharge and survival with a favorable neurologic outcome. Antiarrhythmics (e.g., amiodarone, lidocaine, procainamide) likely do not improve short-term or long-term survival or neurologic outcomes, though guidelines state that amiodarone may be used in those with cardiac arrest and refractory pulseless ventricular tachycardia (pVT)/ventricular fibrillation (VF). Calcium and sodium bicarbonate should not be routinely administered in those with cardiac arrest. Beta-blockers may be considered in those with shock-resistant pVT/VF.

CONCLUSIONS: An understanding of literature updates concerning medication use in cardiac can improve the ED care of these patients.