What causes sinus node dysfunction (SND)?

Updated: Nov 30, 2018
  • Author: Bharat K Kantharia, MD, FRCP, FAHA, FACC, FESC, FHRS; Chief Editor: Mikhael F El-Chami, MD  more...
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Answer

Sinus node dysfunction (SND) occurs as a result of disorders in automaticity, conduction, or both of the sinoatrial (SA) node. [8]  Local cardiac pathology, systemic diseases that involve the heart, and medications or toxins can all be responsible for abnormal SA node function and may result in SND. [8, 9, 10]


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