Table 1. Baseline Clinical Characteristics of the Study Patients.

	Patients (n=57)
Age (yrs)	33.9±13.5
Male gender	26 (45.6)
Height (cm)	167.9±9.2
Weight (kg)	63.1±11.1
BMI (kg/m2)	22.4±3.4
Frequency of syncope before diagnosis	5.2±5.5
Type of NMS
Mixed	14 (24.6)
Cardioinhibitory	3 (5.3)
Vasodepressive	40 (70.1)
Phase of positive diagnostic HUT
Passive	22 (38.6)
Isoproterenol	35 (61.4)
Duration of initial diagnostic HUT (min)	30.1±12.4

BMI, body mass index; NMS, neurally mediated syncope; HUT, head-up tilt test.

Data are presented as mean±SD or number (%).