The left atrium is one of the four chambers of the heart, located on the left posterior side. Its primary roles are to act as a holding chamber for blood returning from the lungs and to act as a pump ...

Left atrial appendage occlusion is a generally safe and effective procedure to lower the risk of stroke in people with atrial fibrillation. It closes or blocks off the left atrial appendage of the ...

The mitral valve allows blood to flow from the left atrium of the heart into the left ventricle. Mitral regurgitation occurs when the mitral valve leaks blood back into the left atrium. A person’s ...