31.   Sudden cardiac arrest is usually caused by ventricular fibrillation, which is when the heart muscle starts quivering and fails to pump blood to the brain and vital organs.

32.   That is because we sweat, making the blood volume go down and so less blood is pumped with each heartbeat.

33.   The atria pump their blood into the ventricles below.

34.   The heart has to pump more blood, so the heart rate goes up.

35.   The heart pumps blood that is laced with baseball.

36.   The HeartMate helps pump blood through the left ventricle in patients awaiting heart transplants.

37.   The molecular biologists who conducted the study believe cells extracted from leg tissue may have even developed the bioelectrical properties that enable the heart to contract and pump blood.

38.   The new study found that the device was effective in patients whose hearts were so damaged from heart attacks that they could no longer pump blood effectively.

39.   The panel did find that BiDil had some effect in improving the ability of weak hearts to pump blood.

40.   The red blood then was pumped back into the other half of the severed carotid.