Sick Sinus Syndrome refers to the dysfunction of the sinus node (heart’s natural pacemaker). The sinus node is an area of specialized cells in the upper right chamber of the heart that controls the rhythm of the heart and produces regular electrical impulses.
People with sick sinus syndrome may have too fast, too slow, or pauses in their heart rhythm. Older people may have high risk in developing this condition. Some diseases and conditions may cause sinus dysfunction, including those that scarring or damaging the heart’s electrical system.
Other causes may include:
- Scar tissue from a past heart surgery
- Certain medications, such as calcium channel blockers or beta blockers used to treat high blood pressure, heart disease, and other conditions
- Breakdown of heart muscle due to age