This document describes a quality improvement project aimed at increasing residents' confidence in treating adult patients with cardiac complaints in the emergency department. The project team conducted mock code simulations using an adult chest pain case from February to June 2015. Residents completed pre-and post-confidence assessments and knowledge quizzes. Faculty evaluated the residents using checklists. The project resulted in a 34% average increase in residents' confidence and a 41% average increase in knowledge from pre- to post-assessment. Checklist scores also improved over time, indicating better adherence to protocols. Barriers like weather cancellations and a colleague's death impacted some sessions. The team plans to continue the training with follow-up courses and expand to other