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 left atrium, which was not markedly dilated or greatly thickened, was almost completely filled by a firm, organized thrombus attached to the posterior, lateral and anterior sides of the atrium, ...