Addison's disease
Chronic fatigue syndrome
Constipation
Depression
Sick Euthyroidism
Hypopituitarism
Hypothermia
Iodine Deficiency
Cardiac
Inferior MI (involving RCA)
Sick sinus syndrome
Neurocardiogenic/reflex-mediated
Increased ICP
Vasovagal reflex
Hypersensitive carotid sinus syndrome
Intra-abdominal hemorrhage (i.e. ruptured ectopic)
Metabolic/endocrine/environmental
Hyperkalemia
Hypothermia (Osborn waves on ECG)<unk> 
Myxedema coma
Hypoglycemia (neonates)
Toxicologic
B-blocker
Ca-channel blocker
Digoxin toxicity
Opioids
Organophosphates
Ethanol
Clonidine
Infectious/Postinfectious
Chagas disease
Lyme disease
Syphilis
Other
Brash syndrome
Inferior MI (involving RCA)
Sick sinus syndrome
Increased ICP
Vasovagal reflex
Hypersensitive carotid sinus syndrome
Intra-abdominal hemorrhage (i.e. ruptured ectopic)
Hyperkalemia
Hypothermia (Osborn waves on ECG)<unk> 
Myxedema coma
Hypoglycemia (neonates)
Myxedema coma
B-blocker
Ca-channel blocker
Digoxin toxicity
Opioids
Organophosphates
Ethanol
Clonidine
Chagas disease
Lyme disease
Syphilis
Brash syndrome
Hypothyroidism
Addison's disease
Congenital adrenal hyperplasia
Chronic fatigue syndrome
Levothyroxine toxicity
Constipation
Hyperthyroidism
Depression