Comparative safety and efficacy of a hybrid intravenous and oral diltiazem protocol for acute rate control in the emergency department.

Study Objective: Intravenous diltiazem has experienced numerous supply shortages over the past few years. The purpose of this study was to compare the safety and efficacy of a traditional diltiazem intravenous bolus and continuous infusion protocol to a diltiazem intravenous bolus and oral maintenance protocol for acute rate control in the emergency department.

Methods: Patients who received intravenous diltiazem in the emergency department between January 1, 2018 and May 31, 2019 were screened.