Heart failure occurs when the heart muscle is so damaged it can no longer pump enough blood to meet the body's needs.
(Heart failure; occurs; T:when the heart muscle is so damaged it can no longer pump enough blood) (the heart muscle; is; so damaged it can no longer pump enough blood) (it; can pump; enough blood; to meet the body's needs; T:no longer) Context(it can pump,List([57, 78))):(it; can pump enough blood to meet; the body's needs)
it can pump,List([57, 78))
Heart failure the heart muscle it it
occurs is can pump can pump enough blood to meet
T:when the heart muscle is so damaged it can no longer pump enough blood
so damaged it can no longer pump enough blood
enough blood to meet the body's needs T:no longer
the body's needs