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.
This can reduce. blood flow to your heart and cause chest. discomfort. Sometimes a blood clot can. suddenly form or get worse and completely. block blood flow, leading to a heart attack. Angioplasty opens blocked arteries and. restores normal blood flow to your heart. muscle. It is not major surgery. It is done. by threading a catheter (thin tube) through. a small puncture in a leg or arm artery to. the heart.