6H's & 5T's

reversible causes associated with cardiac arrest

6H
Hypoxia
Hypovolemia
Hypothermia
Hypo/Hyperglycemia
Hypo/Hyperkalemia
H2 (acidosis)

5T
Tension pneumothorax
Tamponade (cardiac tamponade)
Thrombosis (pulmonary embolism / MI)
Trauma
Toxin