You are evaluating a 58 year old man with chest pain. The BP is 92/50 and HR is 92/mi, nonlabored respiratory rate is 14 breaths/min and the pulse ox reading is 97. What is the most likely diagnosis?
1) Myocardial infarction
2) Pulmonary embolism
3) Pneumonia
4) Gastroesophageal reflux disease
