Ms. Carson is a 71-year-old female who presents with significant pleuritic-type

chest pain. She has no known cardiopulmonary history and does not smoke cigarettes. Her history is significant only for an upper endoscopy this morning for evaluation of severe gastroesophageal reflux disease (GERD). She tolerated the procedure well and was discharged home. Over the afternoon she developed worsening pain on the left side of her chest and finally had to come to the emergency department. Her vital signs are as follows: temperature 100.0°F, pulse 116 bpm, respiratory rate 22 breaths per minute, and blood pressure 96/60 mm Hg. The AGACNP orders which of the following diagnostic studies to confirm the suspected diagnosis?

A.Chest radiograph          B. 12-lead ECG          C. Upper endoscopy          D.Esophagram