Acute coronary syndromes (ACS)
STEMI
Non-STEMI
Unstable angina
Aortic dissection
Cardiac tamponade
Coronary artery dissection
Esophageal perforation (Boerhhaave's syndrome)
Pulmonary embolism
Tension pneumothorax
STEMI
Non-STEMI
Unstable angina
Cholecystitis<unk> 
Mediastinitis
Myocardial rupture
Myocarditis
Pancreatitis
Pericarditis
Pneumothorax
Aortic stenosis
Arthritis
Asthma exacerbation
Biliary colic
Costochondritis
Esophageal spasm
Gastroesophageal reflux disease
Herpes zoster / Postherpetic Neuralgia
Hypertrophic cardiomyopathy
Hyperventilation
Mitral valve prolapse
Panic attack
Peptic ulcer disease
Pleuritis
Pneumomediastinum
Pneumonia
Rib fracture
Stable angina
Thoracic outlet syndrome
Valvular heart disease
Muscle sprain
Psychologic / Somatic<unk> <unk> 
Spinal Root Compression
Tumor<unk> 
Amphetamines
Synthetic cathinones (khat)
Ketamine
Ecstasy (MDMA)
Synthetic cannabinoids
Bath salts
Synthetic cathinones (khat)
Cocaine-associated chest pain
Acute coronary syndromes 
Unstable angina
STEMI
Stable angina
Non-STEMI
Takotsubo cardiomyopathy
Vincent's angina