Acute coronary syndromes (ACS)
STEMI
Non-STEMI
Unstable angina
Aortic dissection
Cardiac tamponade
Coronary artery dissection
Esophageal<unk> rforation (Boerhhaave's syndrome)<unk> 
Tension pneumothorax
STEMI
Non-STEMI
Unstable angina
Cholecystitis
Cocaine-associated chest pain
Mediastinitis
Myocardial rupture
Myocarditis
Pancreatitis<unk> ricarditis
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<unk> ptic ulcer disease
Pleuritis
Pneumomediastinum
Pneumonia
Rib fracture
Stable angina
Thoracic outlet syndrome
Valvular heart disease
Muscle sprain
Psychologic / Somatic Chest Pain
Spinal Root Compression
Tumor<unk> 
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic<unk>  edema
Pneumonia
Pneumocystis Pneumonia (PCP)<unk><unk>  hypertension
Tension pneumothorax
Idiopathic<unk>  fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac
Cardiac tamponade
Cardiogenic<unk>  edema (CHF)
Myocardial Infarction<unk> ricarditis
Myocarditis
Other Associated with Normal/↑ Respiratory Effort
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Other Associated with ↓ Respiratory Effort
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic<unk>  edema
Pneumonia
Pneumocystis Pneumonia (PCP)<unk><unk>  hypertension
Tension pneumothorax
Idiopathic<unk>  fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac tamponade
Cardiogenic<unk>  edema (CHF)
Myocardial Infarction<unk> ricarditis
Myocarditis
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
ALS
Ascites
Uncorrected ASD
Congenital heart disease
COPD exacerbation
Fever
Hyperventilation
Interstitial lung disease
Neoplasm
Obesity
Panic attack
Pleural effusion
Polymyositis
Porphyria
Pregnancy
Rib fracture
Spontaneous pneumothorax
Thyroid Disease
URI
Pulmonary embolism
Acute coronary syndromes 
Pleural effusion
STEMI
Arterial gas embolism
Non-STEMI
Pleuritis
Unstable angina