After  injuries,<unk>   is  the  second  most common  cause of seeking medical attention in emergency  department  (ED) in the United  States  and responsible  for >6.5 million visits, which is 4.7% of all ED  visits.<unk>  also is the cause of nearly 4 million outpatient visits every year in the United States.<unk>  remains a diagnostic challenge in the ED and outpatient setting and needs thorough  clinical  evaluation. Causes of<unk>  include noncardiac,and cardiac in which noncardiac<unk>  is responsible for  more than half of ED visits and only 5.1% will have an acute coronary syndrome. Coronary artery  disease (CAD) is the leading cause of death for men and women. Distinguishing between serious and benign causes of<unk>  is important.<unk>  is the most symptom of CAD in both men and women.
Chest pain
Palpitation
Angina
Abdominal pain
Neck pain
Pain
Orthopnea
Myalgia