Table 1

Patient demographic and clinical data

Patient	Age (years)	Sex	Total noct	Total past year	Daytime VVS	Symptoms during LOC			Body position	Duration LOC (s)	Symptoms after LOC			Tilt	EEG	Comments
Patient	Age (years)	Sex	Total noct	Total past year	Daytime VVS	Nausea	Abdo	Defec	Body position	Duration LOC (s)	Alert	Weak	Tired	Tilt	EEG	Comments
+ve, syncope during 30 minutes of head-up 60° tilt; −ve, no syncope during tilt; Abdo, abdominal pain; Bradycardia, heart rate < 50 beats/min during nocturnal episode; Clusters, episodes clustered in time; Defec, urge to defecate; Duration LOC, maximum time spent unconscious during an episode; EEG, interictal electroencephalogram; F, female; Horiz, horizontal body position at time of attack; M, male; N/D, not done; noct, total number of episodes interrupting sleep during lifetime; Symptoms after LOC, symptoms during recovery after loss of consciousness; Symptoms during LOC, symptoms immediately before or after loss of consciousness; Tilt, head-up tilt test result; Total past year, total number of episodes interrupting sleep during past year; VVS, vasovagal syncope episodes.
1	48	F	100	15	No	Yes	Yes	Yes	Horiz	60	Yes	Yes	Yes	+ve	Normal	Bradycardia
2	38	F	20	4	No	Yes	Yes	Yes	Vertical	60	Yes	Yes	No	−ve	N/D	Clusters
3	65	F	10	2	Yes	Yes	Yes	Yes	Vertical	120	Yes	Yes	Yes	+ve	Normal	Clusters
4	50	F	5	2	Yes	Yes	No	Yes	Horiz	30	Yes	No	Yes	+ve	Normal	None
5	72	F	8	2	Yes	Yes	Yes	Yes	Vertical	60	Yes	Yes	Yes	−ve	N/D	Bradycardia
6	41	F	5	1	No	Yes	Yes	Yes	Horiz	5	Yes	Yes	Yes	N/D	N/D	Bradycardia
7	21	F	20	10	No	Yes	Yes	Yes	Vertical	30	Yes	No	Yes	+ve	Normal	None
8	64	M	75	10	Yes	No	Yes	Yes	Horiz	1200	Yes	Yes	Yes	N/D	N/D	Bradycardia
9	39	M	9	9	Yes	Yes	No	Yes	Vertical	60	Yes	Yes	Yes	−ve	N/D	None
10	70	M	4	2	Yes	Yes	Yes	No	Horiz	60	Yes	Yes	Yes	+ve	N/D	Bradycardia
11	24	F	20	4	Yes	Yes	Yes	Yes	Horiz	180	Yes	Yes	No	+ve	Abnormal	Clusters
12	30	F	5	3	No	Yes	Yes	Yes	Horiz	180	Yes	No	Yes	+ve	Normal	None
13	28	F	5	3	No	Yes	Yes	Yes	Horiz	180	Yes	No	No	−ve	Normal	None