1) Is prolongation of the QTc interval during a exercise stress test considered a positive result for, or enough for a clinical diagnosis of, LQTS? Are there any other conditions aside from LQTS and Brugada syndrome that prolong the QTc upon exercise?
2) What are the current medical recommendations for treating individuals with LQTS who are in the their mid to late 30's who have not suffered severe cardiac events? My understanding is that treatment plans for those in their 40's are not typically as aggressive as those used for younger individuals.
3) Are IED/pacemakers "always" needed for individuals with LQTS who can not tolerate B-blockers, or does placement of an electrical device depend on the patients overall risk factors? My understanding is that B-blockers are the mainstay treatment for LQTS even in those without symptoms but what if a person can not use -blockers?
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