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Sick Sinus Syndrome (SSS)

Also called “sinus node dysfunction,” SSS is not a specific disease, but a group of signs or symptoms that indicate the heart’s natural electrical pacemaker, the sinoatrial node, is not functioning properly.

In SSS, the heart rate may be abnormally slow at rest (bradycardia), or it may fail to speed up with activity or in response to your own adrenaline (chronotropic incompetence). However, at other times, it can run fast. If symptoms develop from SSS, or if the heartbeat is extremely slow even without symptoms, a permanent pacemaker  is the primary treatment.


 

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Sick Sinus Syndrome (SSS)