<unk>  is defined as a discomfort or<unk>  felt anywhere along the front of the body between the upper abdomen and the neck.  The most common causes of<unk>  include diseases of cardiac, pulmonary, and gastrointestinal systems.<unk>  is one of the most common complaints in the ER and it is extremely important to rule out life-threatening conditions that need to be managed immediately such as acute myocardial infarction, aortic dissection, esophageal rupture, pulmonary embolism, and tension pneumothorax.  To guide the diagnosis and therapy, it is important to characterize the location, intensity, quality, onset, radiation, the alleviating and aggravating factors and the associated symptoms of<unk> .  An electrocardiography (ECG) is the most important initial test to diagnose or rule out acute myocardial infarction.  The treatment of<unk>  depends upon the underlying etiology.
Chest pain
Palpitation
Angina
Abdominal pain
Neck pain
Pain
Orthopnea
Myalgia