Although the condition is most common in the elderly, it can occur in persons of all ages, including neonates. Journal of the American College of Cardiology. An electrocardiogram monitors your heart rhythm for problems. Symptoms, which may have been present for months or years, can include syncope, palpitations, and dizziness, as well as symptoms caused by the worsening of conditions such as congestive heart failure, angina pectoris, and cerebral vascular accident. In minimally symptomatic patients, chronic heart rate less than 30 bpm while awake. N Engl J Med.
The pacemaker is programmed to stimulate or "pace" your heart as needed to keep it beating normally.
Diagnosis and Treatment of Sick Sinus Syndrome
Electrodes are taped to your chest to record your heart's electrical signals, which cause your heart to beat. Sick sinus syndrome comprises a variety of conditions involving sinus node dysfunction and commonly affects elderly persons. This allows your doctor to see your heart rhythm at the time of your symptoms, which can help pinpoint sick sinus syndrome. Uncommonly, chronic ischemia may cause fibrosis and lead to symptoms of sick sinus syndrome for months to years after myocardial infarction. In type I 2nd-degree SA SA Wenckebach block, impulse conduction slows before blocking, seen on the ECG as a P-P interval that decreases progressively until the P wave drops altogether, creating a pause and the appearance of grouped beats; the duration of the pause is less than 2 P-P cycles. Although the risk-to-benefit ratio for anticoagulation is not well defined in these patients, warfarin Coumadin has been shown to decrease the number of strokes and embolic events in patients with sick sinus syndrome who have paroxysmal and chronic atrial fibrillation. This page provides a summary definition followed by introductions to our practice drills, quizzes, lessons and interactive guides.