Historical biological theories tend to describe that behaviors are inherited biological tendencies passed down through evolution, and contemporary biosocial theories are explained by saying that genes and other biological features are more facilitators of human behavior instead of determinants.
Like the heart, the LVAD is a pump. One end hooks up to the left ventricle -- that's the chamber of the heart that pumps blood out of the lungs and into the body. The other end hooks up to the aorta, the body's main artery. A tube passes from the device through the skin.
Systolic heart failure typically affects the left side of the heart. This is the side that pumps blood to the body. The heart's lower chamber, called the left ventricle, cannot pump blood as well.It's called systolic because your ventricle doesn't squeeze forcefully enough during systole, which is the phase of your heartbeat when your heart pumps blood.he heart's lower chamber, called the left ventricle, cannot pump blood as well. It's called systolic because your ventricle doesn't squeeze forcefully enough during systole, which is the phase of your heartbeat when your heart pumps blood.