Table 1.

Clinical characteristics of IVF patients

	IVF patients (n = 185)
Age at event, years	39 (27, 52)
Female, n (%)	74 (40%)
Event during exercise, n (%)	38/182 (21%)
History of palpitations, n (%)	21/167 (11%)
History of syncope, n (%)	19/167 (10%)
Family history of SCDa, n (%)	22/170 (12%)
ICD implantation, n (%)	182 (99%)
Follow-up duration, years	5 (2, 8)
Appropriate ICD therapy, n (%)	32/182 (18%)
Death, n (%)	3 (2%)

IVF, idiopathic ventricular fibrillation; SCD, sudden cardiac death; ICD, implantable cardioverter defibrillator.

^aFamily history of SCD is defined as a first-degree family member with SCD < 50 years or multiple second-degree family members with SCD.