Heart Failure and Echocardiographic Changes During Long-term Follow-up of Patients With Sick Sinus Syndrome Randomized to Single-Chamber Atrial or Ventricular Pacing

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In patients with sick sinus syndrome, choice of pacing mode has been implicated in the development of congestive heart failure.


During long-term follow-up, ventricular pacing is associated with a higher incidence of congestive heart failure and consumption of diuretics than atrial pacing. This is accompanied by a decrease in left ventricular fractional shortening and an increased dilatation of the left atrium in the ventricular paced patients. (Circulation. 1998;97:987-995.)

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