Left atrial appendage occlusion or closure

The left atrial appendage (LAA) is a pouch connected to the left atrium of your heart, one of the heart’s upper chambers. When the LAA doesn’t squeeze consistently, such as in atrial fibrillation, the blood inside may form clots which represent a risk of stroke. Left atrial appendage occlusion closure is an alternative treatment to reduce this risk if you’re unable to take blood-thinning medication.