16. Sick Sinus Syndrome

  1. David H. Bennett MD FRCP

Published Online: 1 NOV 2012

DOI: 10.1002/9781118432389.ch16

Bennett's Cardiac Arrhythmias: Practical Notes on Interpretation and Treatment, Eighth Edition

Bennett's Cardiac Arrhythmias: Practical Notes on Interpretation and Treatment, Eighth Edition

How to Cite

Bennett, D. H. (2013) Sick Sinus Syndrome, in Bennett's Cardiac Arrhythmias: Practical Notes on Interpretation and Treatment, Eighth Edition, John Wiley & Sons, Ltd, Oxford. doi: 10.1002/9781118432389.ch16

Author Information

  1. Senior Consultant Cardiologist, University Hospital of South Manchester, Manchester, UK

Publication History

  1. Published Online: 1 NOV 2012
  2. Published Print: 14 JAN 2013

ISBN Information

Print ISBN: 9780470674932

Online ISBN: 9781118432389

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Keywords:

  • Atrial ectopic beats;
  • Bradycardia–tachycardia syndrome;
  • ECG characteristics;
  • Sick Sinus Syndrome;
  • Sinoatrial block;
  • Sinus arrest;
  • Sinus bradycardia

Summary

Sick sinus syndrome is due to impairment of sinus node function or of sinoatrial conduction and may cause sinus bradycardia, sinoatrial block or sinus arrest. A long pause in sinus node activity without an adequate junctional or ventricular escape rhythm will result in near-syncope or syncope necessitating pacemaker implantation. Causes of sick sinus syndrome include idiopathic fibrosis of the sinus node, cardiomyopathy and cardiac surgery.

The bradycardia–tachycardia syndrome is the association of sick sinus syndrome with episodes of atrial fibrillation, flutter or tachycardia, but not AV re-entrant tachycardia. There is a high risk of systemic embolism.