This case involves a sixty-five-year-old woman who presented to the emergency room with new-onset dyspnea. The patient reported that when she walked more than three blocks, she became short of breath and experienced severe pain in the abdomen. The patient had a history of type 2 diabetes, for which she was using Onglyza, hyperlipidemia, hypertension, and stage 2 chronic kidney disease. In the ER, the monitors showed her resting heart rate at 52bpm and her blood pressure was 148/88 mmHg. On ECG, the patient’s PR interval was 250 and she was found to have an incomplete left bundle branch block. The ER physician determined that the situation was not urgent enough to have the patient admitted to the hospital, and he suggested that she follow-up with an outpatient cardiology clinic. The patient was discharged and found dead from cardiac arrest in her home three days after her release from the emergency room.