Which of the following is untrue regarding "sick sinus syndrome":: (A) Occurs most commonly in elderly, (B) Coronary disease is a common cause, (C) ECG manifestations are often intermittent, (D) Most symptomatic patients will require permanent pacing.
Answer is B. 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.