Sick sinus syndrome

Symptoms of dizziness, confusion, fainting, and heart failure due to a problem with the sinus node of the heart, which acts as the body’s natural pacemaker. If the sinus node is not functioning normally, it is reflected in an abnormally slow heart rate (bradycardia). This can cause poor pumping by the heart, which can impair the circulation. Diagnosis is usually by electrocardiogram (EKG). Treatment includes medications, such as the class of drugs called calcium antagonists.

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sick sinus syndrome n a cardiac disorder typically characterized by alternating tachycardia and bradycardia

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(SSS) a syndrome of bradycardia, generally intermittent and sometimes mixed with episodes of atrial tachyarrhythmias (see bradycardia-tachycardia s.) or periods of sinus arrest, due to malfunction originating in the supraventricular portion of the cardiac conduction system.

Sick sinus syndrome; the monitor lead shows sinus bradycardia with a long sinus pause.