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.
Left ventricular hypertrophy (LVH) occurs when the muscle tissue in the heartâs main pumping chamber becomes enlarged. LVH is often caused by high blood pressure or other heart problems and can lead to serious complications, such as heart disease, heart attack and heart failure.