Hypovolemia
More common and more profound in peds
hemorrhage,
More common and more profound in peds
hemorrhage,
dehydration  (from nausea/vomiting, insensible losses due to heat illness_)
Cardiogenic
Congenital heart disease, CHF
Myocarditis
Dysrhythmias
Obstructive
PTX, PE, tamponade
Distributive
sepsis
Anaphylaxis
Adrenal insufficiency
Liver failure
Neurogenic shock
Congenital heart disease, CHF
Myocarditis
Dysrhythmias
PTX, PE, tamponade
sepsis
Anaphylaxis
Adrenal insufficiency
Liver failure
THE MISFITS 
Trauma
Heart
Congenital heart disease
Hypovolemia
Endocrine
hypoglycemia
Hypothyroidism
Congenital adrenal hyperplasia
Metabolic
Sodium
Calcium
Glucose
Inborn errors of metabolism
Seizure
Formula / feeding problems
Hyponatremia
Hypocalcemia
FPIES / Food protein-induced enterocolitis syndrome
Intestinal Disasters
Duodenal atresia
Midgut volvulus
Necrotizing enterocolitis
Intussusception
Toxin
Sepsis
Congenital heart disease
Hypovolemia
hypoglycemia
Hypothyroidism
Congenital adrenal hyperplasia
Sodium
Calcium
Glucose
Hyponatremia
Hypocalcemia
FPIES / Food protein-induced enterocolitis syndrome
Duodenal atresia
Midgut volvulus
Necrotizing enterocolitis
Intussusception
Undifferentiated shock 
Hypovolemia
Neurogenic shock
More common and more profound in peds
Spinal shock
hemorrhage,
Cardiogenic shock
Hemorrhagic shock