Answer and Explanation 9

9,  The correct answer is D.  While gastroesophageal reflux disease (GERD) can give you similar symptoms of chest pain when laying flat alleviated leaning forward it will not give you EKG changes.  Pneumomediastinum typically does not give you EKG changes unless it is severe enough to induce tamponade.  Pulmonary Emboli can give EKG changes but does not give EKG changes in all leads .  Diffuse ST elevation in all leads is consistent with pericarditis.