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.
Ongoing poor blood flow to the heart muscle reduces the heart's ability to contract and causes it to pump less blood during each beat. The less blood your heart pumps out to your body, the less blood it is actually pumping back to itself through the coronary arteries. The end result is that heart failure makes ischemia worse, which in turn makes heart failure worse. Mitral valve regurgitation can gradually lead to systolic heart failure.