Sick sinus syndrome

Electrocardiogram from a man with bradycardia-tachycardia syndrome following mitral valvuloplasty, resection of the left atrial appendage and maze procedure. The ECG shows AV-junctional rhythm resulting in bradycardia at around 46 beats per minutes. The second beat is most likely an atrial extrasystole, given the atypical P wave (negative in I, positive in aVR).

This ECG from the same patient shows atrial fibrillation at around 126 beats per minute.

Sick sinus syndrome (SSS), also called sinus dysfunction (SND), or sinoatrial node disease, is a group of abnormal heart rhythms (arrhythmias) presumably caused by a malfunction of the sinus node, the heart's primary pacemaker. Bradycardia-tachycardia syndrome is a variant of sick sinus syndrome in which slow arrhythmias and fast arrhythmias alternate. It is often associated with ischaemic heart disease and heart valve disease.

单词	Sick sinus syndrome
释义	Sick sinus syndrome 英语百科 Sick sinus syndrome Sick sinus syndrome (SSS), also called sinus dysfunction (SND), or sinoatrial node disease, is a group of abnormal heart rhythms (arrhythmias) presumably caused by a malfunction of the sinus node, the heart's primary pacemaker. Bradycardia-tachycardia syndrome is a variant of sick sinus syndrome in which slow arrhythmias and fast arrhythmias alternate. It is often associated with ischaemic heart disease and heart valve disease.
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