METHODS	Five methods were used to assess STR : 1 ) summed % STR across multiple leads ( SigmaSTR ) ; 2 ) % STR in the single lead with maximum baseline STE ( MaxSTR ) ; 3 ) absolute maximum STE before the procedure ; 4 ) absolute maximum STE after intervention ( MaxSTPost ) ; and 5 ) a categorical variable based upon MaxSTPost ( High Risk ) .\