Which of the following is untrue regarding "sick sinus syndrome":
Occurs most commonly in elderly
Coronary disease is a common cause
ECG manifestations are often intermittent
Most symptomatic patients will require permanent pacing.
Coronary disease is a common cause Sick sinus syndrome is usually caused by idiopathic fibrosis of the sinus node. - Coronary disease is an uncommon cause. - Pharmacologic therapy for sick sinus syndrome has been difficult but recent studies have indicated that oral theophylline may be effective especially when sinus bradycardia is the major manifestation.