Sinus node dysfunction, previously known as sick sinus syndrome, describes disorders related to abnormal conduction and propagation of electrical impulses at the sinoatrial node. An abnormal atrial rate may result in the inability to meet physiologic demands, especially during periods of stress or physical activity.

What is the treatment for sinoatrial node dysfunction?

Pacemaker therapy is the only effective surgical care for patients with chronic, symptomatic sinus node dysfunction (SND). The major goal of pacemaker therapy in patients with SND is to relieve symptoms.

What causes damage to the SA node?

Certain medications, such as drugs given to treat abnormal heart rhythms or high blood pressure, can also disrupt SA node function. One of the most common causes of sick sinus syndrome in children is trauma to the SA node, such as damage that occurs during heart surgery.