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.
Main Content: Peripheral artery disease and high blood pressure. If high blood pressure is left untreated for a long time, it can put extra strain on the arteries in your arms and legs and may cause the blood vessels in the legs to narrow, causing painful cramps. High blood pressure can cause your arteries to become more narrow.