Vorhofanhängsel

Vorhofanhängsel, also known as atrial appendage or auricle, refers to a small, ear-shaped pouch that projects from the upper chambers of the heart, the atria. There are two such appendages, one on the left atrium and one on the right atrium. The left atrial appendage is a particularly significant structure due to its role in cardiovascular health and disease. It is a muscular pouch with a narrow opening connecting it to the main body of the left atrium.

The primary function of the atrial appendages is not fully understood, but they are thought to play a role in atrial distension and the release of natriuretic peptides, hormones that help regulate blood pressure and fluid balance. However, the left atrial appendage is also a common site for the formation of blood clots, especially in individuals with conditions like atrial fibrillation. In atrial fibrillation, the atria quiver rather than beat effectively, leading to stagnant blood flow within the appendage, which increases the risk of thrombus formation. These clots can then dislodge and travel to other parts of the body, causing strokes or other embolic events.

Due to this association with stroke, the left atrial appendage has become a target for medical interventions aimed at reducing embolic risk. Procedures like left atrial appendage occlusion (LAAO) involve closing off the appendage using devices or surgical techniques to prevent clot formation and embolization. Understanding the anatomy and physiology of the vorhofanhängsel is crucial for diagnosing and managing various cardiovascular conditions.