Sinus node dysfunction
Sinus Node Dysfunction
Sinus node dysfunction (pronounced: /ˈsaɪnəs noʊd dɪsˈfʌŋkʃən/), also known as sick sinus syndrome or sinoatrial node disease, is a group of heart rhythm problems (arrhythmias) in which the heart's natural pacemaker (sinus node) doesn't work properly. The sinus node is an area of specialized cells in the upper right chamber of the heart that controls the rhythm of your heart.
Etymology
The term "sinus node" is derived from the Latin sinus, meaning "bay" or "curve", and the Greek nodos, meaning "knot". The term "dysfunction" is derived from the Greek dys, meaning "bad" or "difficult", and the Latin functio, meaning "performance".
Symptoms
Symptoms of Sinus node dysfunction may include fatigue, dizziness, lightheadedness, fainting or near fainting, shortness of breath, chest pains, and a rapid or slow heart rate.
Causes
Sinus node dysfunction can be caused by age-related wear and tear, damage to the heart from heart disease or heart attack, medications, and certain health conditions.
Diagnosis
Diagnosis of Sinus node dysfunction typically involves an electrocardiogram (ECG), Holter monitoring, event recording, and an electrophysiology study (EPS).
Treatment
Treatment for Sinus node dysfunction may include lifestyle changes, medication, pacemaker implantation, or radiofrequency ablation.
Related Terms
- Arrhythmia
- Electrocardiogram
- Holter monitor
- Electrophysiology study
- Pacemaker
- Radiofrequency ablation
External links
- Medical encyclopedia article on Sinus node dysfunction
- Wikipedia's article - Sinus node dysfunction
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