Table 1

Clinical Characteristics

Early GroupLatter Groupp Value
Patients165 (36.9)282 (63.1)
Age at diagnosis, yrs44.6 ± 1445.3 ± 15.1NS
Male129 (78)207 (73)NS
Family history of SCD43 (26.1)67 (23.8)NS
AF before diagnosis25 (15.2)67 (6.8)0.008
Patient history of SCD20 (12.1)13 (4.6)0.005
History of syncope49 (29.7)93 (33)NS
Spontaneous type 1 at diagnosis87 (52.7)74 (26.2)0.0002
EPS performed155/165 (93.9)260/282 (92.2)NS
VT/VF inducible at EPS54/155 (34.8)50/260 (19.2)0.001
ICD implantation79 (47.9)124 (44)NS

Values are n (%), mean ± SD, or n/N (%).

AF = atrial fibrillation; EPS = electrophysiological study; ICD = implantable cardioverter-defibrillator; SCD = sudden cardiac death; VF = ventricular fibrillation; VT = ventricular tachycardia.