Synonyms: sinus node dysfunction, sinoatrial disease, tachy-brady syndrome
Sick sinus syndrome is a collection of conditions in which the ECG indicates sinus node dysfunction. It is characterised by sinus node dysfunction with an atrial rate inappropriate for normal requirements. Sick sinus syndrome is usually caused by idiopathic fibrosis of the sinus node.
This is a companion discussion topic for the original article at https://patient.info/doctor/sick-sinus-syndrome