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: Enlarged heart (LVH) and high blood pressure. If you have high blood pressure, this means that your heart has to work harder to push blood round your body. To cope with this extra effort, your heart muscles become thicker and stiffer, which can make the heart become enlarged. An enlarged heart will not pump as well as it should, and this can cause you problems.