The left ventricle is the main pumping chamber of the heart, and it is responsible for pumping oxygen-rich blood to the entire body, as stated by the American Heart Association. The human heart consists of four chambers: the right atrium, the right ventricle, the left atrium and the left ventricle. While each chamber has a unique function, they all work together to form a strong, hard-working pump.Know More
Cleveland Clinic explains that a normal heart beats about 60 to 80 times per minute, pumping blood throughout the body. Blood initially enters the heart at the right atrium, which is the upper right chamber. This blood, which is low in oxygen, flows through the tricuspid valve and enters the right ventricle. From the right ventricle, the blood is pumped into the pulmonary arteries and is transported to the lungs, where it picks up oxygen. This oxygen-rich blood is returned to the left atrium by the pulmonary veins. The blood in the left atrium passes through the mitral valve and into the left ventricle, where it is pumped into the body's general circulation.
Left ventricular function can be determined by performing an ejection fraction test, most often using an echocardiogram. Cleveland Clinic explains that ejection fraction measures how much blood is pumped out of the left ventricle with each contraction. A normal ejection fraction ranges from 55 to 70 percent. A lower ejection fraction may indicate damage to the heart muscle and usually requires further evaluation.Learn more about Organs
According to HowStuffWorks, blood flows into the right side of the heart and out to the body from the left side. During its passage, it passes through all four chambers of the heart. Between passing through the right and left sides of the heart, blood is pumped to the lungs for oxygenation.Full Answer >
Blood enters the heart in the right atrium, passes into the right ventricle and is then pumped to the lungs; after leaving the lungs, the blood travels back into the left atrium, into the left ventricle and then flows into the rest of the body. This is called the mammalian double-circulatory system because it has two distinct circuits. Keeping oxygenated blood completely separate from deoxygenated blood improves efficiency.Full Answer >
The ejection fraction is a measurement of how much blood is pumped from the left or right ventricle of the heart during each contraction. This test is used to determine if there is heart failure.Full Answer >
The aortic semilunar valve prevents the backflow of blood when the left ventricle of the heart is returning to the relaxed state after pumping. The aorta is the largest artery in the body, and despite its size, is under high pressure. The pumping of the left ventricle, the largest chamber of the heart, exceeds the pressure in the aorta forcing blood in, but when it stops, aortic pressure is greater.Full Answer >