Congenital<unk>  syndrome (rare, but important cause of sudden cardiac death)
Hypercalcemia
Hyperkalemia
Digoxin toxicity
Acidosis
SIRS
ACS
Increased vagal tone
Short QT
Wide QRS
T wave changes
Wide-complex tachycardia
AVR ST elevation
Narrow-complex tachycardia
Hypopyon
Third degree AV block