Heart: The hollow, muscular organ that maintains the circulation of the blood.

Terms Related to Heart

• Heart Ventricle

  The lower right and left chambers of the heart. The right pumps venous blood into the lungs and the left pumps oxygenated blood into the ...

• Heart Massage

  Rhythmic compression of the heart by pressure applied manually over the sternum (closed heart massage) or directly to the heart through an opening in the ...

• Heart Septum

  The thin membranous structure between the two heart atria or the thick muscular structure between the two heart ventricles.

• Artificial Heart

  A pumping mechanism that duplicates the output, rate, and blood pressure of the natural heart. It may replace the function of the entire heart or ...

• Heart-Assist Device

  Small pumps, often implantable, designed for temporarily assisting the heart, usually the left ventricle, to pump blood; they consist of a pumping chamber and a ...

• Ischemic Heart Disease

  A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to ...

• Heart Volume

  The volume of the heart, usually relating to the volume of blood contained within it at various periods of the cardiac cycle. The amount of ...

• Fetal Heart

  The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart ...

• Heart Lung Bypass

  Diversion of the flow of blood from the entrance of the right atrium directly to the aorta (or femoral artery) via an oxygenator thus bypassing ...

• Heart Sound

  The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning ...