Table 1. Series comparing patients with polymorphic versus monomorphic idiopathic RVOT VT: clinical characteristics^*.

	Polymorphic VT	Monomorphic VT	p
Age at presentation (year)
Noda et al.10)	39±10	43±14	NS
Igarashi et al.18)	43±14	51±15	NS
Kurosaki et al.16)	45±11	47±14	NS
Female (%)
Noda et al.10)	56	71	NS
Igarashi et al.18)	61	43	NS
Kurosaki et al.16)	86	65	NS
Familial sudden death (%)
Noda et al.10)	6	1	NS
Igarashi et al.18)	0	0	NS
Kurosaki et al.16)	0	1	NS
Duration of symptoms (month)
Noda et al.10)	80±103	69±79	NS
Kurosaki et al.16)	120±118	81±105	NS
History of syncope (%)
Noda et al.10)	69	18	<0.001
Igarashi et al.18)	61	14	<0.01
Kurosaki et al.16)	57	10	<0.001

Values are presented as mean±standard deviation or number (%). ^*Studies comparing patients with idiopathic polymorphic RVOT VT to patients with monomorphic RVOT VT (16 vs. 85 patients in the study by Noda, et al.¹⁰⁾ 18 vs. 21 patients in the study by Igarashi et al.¹⁸⁾ and 14 vs. 77 in the study by Kurosaki et al).¹⁶⁾ RVOT: right ventricular outflow tract, VT: ventricular tachycardia, NS: not statistically significant