ERA. 1  baseball, baseball game - a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs; he played baseball in high school; there was a baseball game on every empty lot; there was a desire for National League ball in the area; play ball!.
The contraction of the heart muscle starts in the two atria, which push the blood into the ventricles. Then the walls of the ventricles squeeze together and force the blood out into the arteries: the aorta to the body and the pulmonary artery to the lungs.
Heart failure is often caused by coronary artery disease. This condition causes the arteries and blood veins to constrict. This leads to lower blood flow and decreased nutrients in the body. A heart attack or cardiomyopathy can also lead to additional damage to the heart muscle.eart failure is when the heart cannot pump the way it is supposed to. The weaker heart muscles cause the blood to move slower through the veins. This limits the ability of cardiovascular system to transport nutrient and oxygen.