What is sinus node dysfunction?

Also known as: sinus node disease, sick sinus syndrome

The sinus node is a group of cells within the heart that establishes its rhythm. When something goes wrong with the sinus node, it can cause an arrhythmia, or heart rhythm problem. This is known as sinus node dysfunction. 

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Reviewed by: Anthony F. Rossi, MD

This page was last updated on: 1/29/2019 3:21:13 PM