What is the prognosis of 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

The prognosis of patients with sinus node dysfunction (SND) is dependent on the underlying associated condition. The incidence of sudden cardiac death in patients with SND is low. [21]  Pacemaker therapy does not appear to affect survival in patients with SND. [24, 25, 26]

Patients with tachy-brady syndrome have a worse prognosis than do patients with isolated SND. The overall prognosis in patients with SND and additional systemic ventricular dysfunction (eg, numerous postoperative Mustard and Fontan patients) depends on their underlying ventricular dysfunction or degree of congestive heart failure (CHF).

In patients who have undergone a Fontan surgery and developed SND, endocardial atrial leads can be implanted relatively safely and can permit low-energy thresholds for as long as 5 years after implantation. [27]


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