Patients with sick sinus syndrome may convert to atrial fibrillation, a rhythm that is amenable to medical therapy and may eliminate the need for pacemaker placement. Treatment of sinoatrial rhythm disturbances with permanent cardiac pacing. The etiology of syncope in patients with negative tilt table and electrophysiological testing. Clinical and electrophysiologic documentation of severe toxic effect on sinus node function. Medicine is a constantly changing science and not all therapies are clearly established.
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