Any duplication or distribution of the information contained herein is strictly prohibited. Sick sinus syndrome, or sinus node dysfunction, is when the heart's natural pacemaker (sinus node) is damaged and unable to produce a normal heartbeat.

Sinuses are hollow air-filled spaces found in facial bones, they are located behind the cheeks, forehead and help to keep the nose moist. Usually, they do not have any germs, but when they get infected due to cold, smoking, allergies, weakened immune system or structural problems, they cause pain, mucus discharge. Treatment is by steam inhalation, or antibiotics. A doctor should be consulted if congestion and pain with running nose persists for a longer time.

**Sick sinus syndrome**, also known as **sinus node dysfunction** or **sinus node disease**, is a group of heart rhythm problems (arrhythmias) in which the heart's natural pacemaker (sinus node) doesn't

Sick sinus syndrome (SSS) is the name that doctors use to refer to heart rhythm problems. These occur when the sinus node, the heart’s natural pacemaker, does not keep a regular heartbeat. People with SSS may have bradycardia, a slow heart rate of less than 60 beats per minute, or tachycardia, when the heart produces more than 100 beats per minute.