Asymptomatic preexcitation found on routine ECG in healthy men has a benign natural history, often disappearing over time without causing excess morbidity or mortality.
Supports watchful waiting for asymptomatic preexcitation on routine ECG; leaves open confirmation in prospective studies.
Preexcitation found on routine ECG in our originally healthy male study group did not confer excess morbidity or mortality, even in those study members who developed symptomatic arrhythmias. Most preexcitation was intermittent and disappeared over time.
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Krahn et al. (1992) studied this question.