OMIM

The term 'sick sinus syndrome' encompasses a variety of conditions caused by sinus node dysfunction. The most common clinical manifestations are syncope, presyncope, dizziness, and fatigue. Electrocardiogram typically shows sinus bradycardia, sinus arrest, and/or sinoatrial block. Episodes of atrial tachycardias coexisting with sinus bradycardia ('tachycardia-bradycardia syndrome') are also common in this disorder. SSS occurs most often in the elderly associated with underlying heart disease or previous cardiac surgery, but can also occur in the fetus, infant, or child without heart disease or other contributing factors, in which case it is considered to be a congenital disorder (Benson et al., 2003). (608567)

MalaCards based summary

Sick Sinus Syndrome 1, also known as sinus node disease, familial, autosomal recessive, is related to sick sinus syndrome 2 and sick sinus syndrome 3, and has symptoms including atrioventricular block, prolonged qt interval and sinus bradycardia. An important gene associated with Sick Sinus Syndrome 1 is SCN5A (Sodium Voltage-Gated Channel Alpha Subunit 5). Affiliated tissues include heart.

UniProtKB/Swiss-Prot

Sick sinus syndrome 1: The term 'sick sinus syndrome' encompasses a variety of conditions caused by sinus node dysfunction. The most common clinical manifestations are syncope, presyncope, dizziness, and fatigue. Electrocardiogram typically shows sinus bradycardia, sinus arrest, and/or sinoatrial block. Episodes of atrial tachycardias coexisting with sinus bradycardia ('tachycardia-bradycardia syndrome') are also common in this disorder. SSS occurs most often in the elderly associated with underlying heart disease or previous cardiac surgery, but can also occur in the fetus, infant, or child without heart disease or other contributing factors. SSS1 onset is in utero, infancy, or early childhood.