His heart had pumped too much blood through them at top pressure.
In others, however, it can make the heart less able to pump blood through the body.
It means the heart can't pump enough blood to meet the body's needs.
This makes it more difficult for the heart to pump blood away from itself to the rest of the body.
The primary responsibility of the heart is to pump blood around the body.
It does not have the strength to pump enough blood to the rest of the body.
The function of the heart is to pump blood throughout the body.
Or whatever it is that he uses to pump blood.
"That's because my heart stopped pumping blood about ten minutes ago."
The heart is simply a big muscle used to pump blood.