Seizure
Breath-holding spell
Hyperventilation syndrome
Pregnancy (especially ectopic)
Hypoglycemia
Cardiac disease
Tet spell
Hypertrophic cardiomyopathy
Brugada Syndrome
Dysrhythmias
Long QT syndrome<unk> 
Toxicologic exposure (stimulants or depressant)
CO poisoning
Ethanol toxicity
Drugs of abuse
Tet spell
Hypertrophic cardiomyopathy
Brugada Syndrome
Dysrhythmias
Long QT syndrome<unk> 
CO poisoning
Ethanol toxicity
Drugs of abuse
Idiopathic (most common)
Precordial catch syndrome
Sudden, intense pain with deep inspiration, self-resolving
Usually located to one finger point and the intercostal space (often at apex of heart)
Musculoskeletal
Costochondritis, trauma
Pulmonary
Pneumothorax
Pneumonia (peds)
Pulmonary embolism
Aortic dissection
Uncommon but consider with history of connective tissue disease
GI
Esophagitis
Esophageal spasm
Gastritis
Psychosomatic
Panic attack
Anxiety
Cardiac (1%)
Left-sided obstructive lesions
Dysrhythmias
HOCM
Pericarditis
Prinzmetal's angina (vasospasm)
MI
Rare, even post-Kawasaki
Consider<unk>  artery dissection
Mitral valve prolapse<unk> ]
Sudden, intense pain with deep inspiration, self-resolving
Usually located to one finger point and the intercostal space (often at apex of heart)
Costochondritis, trauma
Pneumothorax
Pneumonia (peds)
Pulmonary embolism
Aortic dissection
Uncommon but consider with history of connective tissue disease
Uncommon but consider with history of connective tissue disease
Esophagitis
Esophageal spasm
Gastritis
Panic attack
Anxiety
Left-sided obstructive lesions
Dysrhythmias
HOCM
Pericarditis
Prinzmetal's angina (vasospasm)
MI
Rare, even post-Kawasaki
Consider<unk>  artery dissection
Mitral valve prolapse<unk> ]
Rare, even post-Kawasaki
Consider<unk>  artery dissection
Anomalous coronary arteries
Seizure
Coronary artery vasospasm
Breath-holding spell
Left ventricular pseudoaneurysm
Hyperventilation syndrome
Implantable Cardioverter-Defibrillator complication
Pregnancy 