Atrial Septal Aneurysm & Stroke: Understanding the Risk

An atrial septal aneurysm (ASA) is a rare condition in which the atrial septum, the wall that separates the upper chambers (atria) of the heart, develops a bulge or protrusion. ASAs are often small and do not cause any symptoms or complications. However, in some cases, a large ASA can cause a small stroke.

A small stroke, also known as a transient ischemic attack (TIA), occurs when there is a temporary disruption of blood flow to a part of the brain. TIAs can cause symptoms such as sudden weakness or numbness on one side of the body, slurred speech, or vision problems. In most cases, the symptoms of a TIA resolve within a few minutes or hours.

ASAs can cause a small stroke by forming a blood clot that travels to the brain. The blood clot can form in the ASA itself or in the heart chamber near the ASA. The risk of stroke is higher in people with a large ASA, an underlying heart condition, or a history of stroke or TIA.

If you have an ASA, your doctor may recommend regular monitoring to check for any changes in its size or shape. In some cases, surgery may be necessary to repair a large ASA and reduce the risk of stroke.