 Increased levels of catecholamines and cortisol can cause a hypermetabolic state that can last for years . This is associated with increased cardiac output , metabolism , a fast heart rate , and poor immune function . 
 Increased levels of catecholamines and cortisol can cause a hypermetabolic state <a href='null_relcl' title='1'><mark>that</mark></a>can last for years . This is associated with increased cardiac output , metabolism , a fast heart rate , and poor immune function . 
Increased levels of catecholamines and cortisol can cuz a hypermetabolic state can last fa yrs . dis is associated witt increased cardiac output , metabolism , a fast heart rate , and poor immune function .