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All about sick sinus syndrome causes of sick sinus syndrome symptoms of sick sinus syndrome diagnosis of sick sinus syndrome treatment for sick sinus syndrome arrhythmias (abnormal heart rhythms) {bundle branch block cardiac arrhythmia atrial fibrillation atrial flutter supraventricular tachycardia sick sinus syndrome ventricular arrhythmias ventricular tachycardia ventricular fibrillation heart block Brugada syndrome long QT syndrome short QT syndrome Wolff-Parkinson-White syndrome (WPW syndrome)}

What is sick sinus syndrome?

Sick sinus syndrome, also called Bradycardia-tachycardia syndrome is a group of abnormal heartbeats (arrhythmias) presumably caused by a malfunction of the sinus node, the heart's "natural" pacemaker. Sick sinus syndrome is a disorder of the sinus node of the heart, which regulates heartbeat. With sick sinus syndrome, the sinus node fails to signal properly,

resulting in changes in the heart rate.

The sinus node in the heart functions as the heart's pacemaker, or beat regulator. In sick sinus syndrome, patients normally will experience bradycardia, or slowed heart rate. Also, it is not uncommon to see fluctuations between slow and rapid heart rate (tachycardia). This makes the diagnosis and treatment of sick sinus syndrome more complicated than most other cardiac arrhythmias (irregular heart beats). A sick sinus node may be responsible for starting beats too slowly, pausing too long between initiation of heartbeats, or not producing heartbeats at all.

Sick sinus syndrome is a type of bradycardia in which the sinoatrial node (the heart’s natural pacemaker) is not functioning as it should. This means that the electrical signal that starts a heartbeat either moves too slowly through the SA node (sinoatrial block) or that there are pauses in delivery of the electrical signal (sinus arrest). SSS can also cause tachycardia (heart rates that are too fast) or bradycardia-tachycardia syndrome (heart rates that fluctuate between being too slow and too fast).

More information on sick sinus syndrome

What is sick sinus syndrome? - Sick sinus syndrome (Bradycardia-tachycardia syndrome) is a group of abnormal heartbeats (arrhythmias) caused by a malfunction of the sinus node.
What causes sick sinus syndrome? - Sick sinus syndrome is often caused or worsened by medications such as digitalis, calcium channel blockers, beta-blockers, sympatholytic medications.
What're the symptoms of sick sinus syndrome? - Symptoms sick sinus syndrome of are those associated with slow heart rate, such as light-headedness, dizziness, fatigue and fainting.
How is sick sinus syndrome diagnosed? - Diagnosis of sick sinus syndrome begins with a history and physical exam. Electrocardiograms provide a record of the heart's electrical activity.
What's the treatment for sick sinus syndrome? - Patients with sick sinus syndrome should generally receive dual chamber pacing systems to prevent atrial fibrillation.
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