An obese male patient comes to the ER for acute chest pain. Cardiac workup has been negative. He describes the pain as burning and feeling like something is sliding. A chest x-ray reveals that most of his stomach is in the thoracic cavity. What is the cause of the chest pain?
a. Acute myocardial infarction
b. Hiatal hernia
c. Esophageal cancer
d. Obstructive sleep apnea