Sick sinus syndrome can involve abnormally slow heart rates, abnormally fast heart rates, or alternating fast and slow heart rates, known as "tachy-brady syndrome." Sick sinus syndrome usually affects older adults, with an average age of 68 years sick sinus syndrome affects one in every 600 cardiac patients 65 years or older. This occurs when the heart rate is too slow for a long period of time such that the brain is at risk of becoming damaged. Confusion or loss of consciousness: In severe cases, people with sick sinus syndrome can experience confusion or loss of consciousness.This can cause sudden-onset numbness or weakness, usually on one side of the body. Sudden-onset numbness or weakness: Some people can develop heart rhythm abnormalities that increase the risk of developing a blood clot in the heart, which can then travel to the brain and cause a stroke.Shortness of breath, especially when active: During exercise or activity your body needs even more blood that the heart is not supplying fast enough.This occurs because the heart is not beating normally, and in some cases, sick sinus syndrome can be associated with other abnormal heart rhythms. Rapid or "skipped" beats: This can be described as occasional feelings of a fluttering of the chest or a feeling of a skipped beat (palpitations).Other symptoms of sick sinus syndrome that may be experienced include: It can eventually become more frequent and severe. Chest discomfort: This can also be described as pain, and may be infrequent.Feeling more tired than usual: This happens because your heart is not beating fast enough to provide blood to the rest of your body.This happens when the heart is not beating fast enough to provide blood to the brain. This occurs in about 50 percent of patients. Feeling lightheaded or about to pass out: This is the most common symptom in which you feel as though you may faint, also called syncope.The more common symptoms of sick sinus syndrome include: Sick sinus syndrome can present with a few main symptoms and others that only occur in some people or very severe cases. Treatment is only for severe cases and involves a pacemaker. Otherwise, your doctor may use a longer term monitoring device. You should visit your primary care physician, where an ECG can measure the electrical rhythms of the heart and potentially identify Sick Sinus Syndrome. Other treatments include medications to temporarily increase the pacing of the heart and medications to reduce the risk of developing a blood clot. The best long-term treatment is implantation of an artificial pacemaker. The diagnosis is made by electrocardiography (EKG) or cardiac monitoring. Symptoms include feeling lightheaded or passing out, fatigue, chest discomfort, a sensation of rapid or skipped beats, shortness of breath, sudden-onset numbness or weakness, and confusion or loss of consciousness. Causes include replacement of pacemaker cells with aging, heart disease or heart attack, inflammation or infiltration of the heart, trauma, medications, toxins, abnormal electrolyte levels, and mutations in certain genes. Sick sinus syndrome is a condition in which the normal pacemaker of the heart is unable to keep the heart beating at a normal rate or rhythm to deliver blood to the body.
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