Sick sinus syndrome is group of rhythm disturbances of the heart (arrhythmias) related to sino-atrial node dysfunction, more commonly seen among the elderly.
Holter monitoring gives doctors a constant reading of the heart rate and rhythm over a 24-hour period (or longer). It is a non-invasive procedure that can be used at home.
Atrial fibrillation may not be life-threatening in itself but it is important to understand the causes, symptoms and treatments because of the risk of life-threatening complications.