This is a prospective observational study design. The investigators will prospectively enroll eligible consecutive patients who present to the emergency department with undifferentiated chest pain or shortness of breath. Patients will be included if a provider has ordered (or is planning on ordering) a cardiac ultrasound as part of the patient's diagnostic workup. Research associates will screen for these two chief complaints and will then approach the ED provider and ask if they ordered or are planning to order a cardiac ultrasound. ED providers may also contact research associates to enroll patients that meet the study criteria.