ACC Expert Consensus Document: Tilt table testing for assessing syncope - Benditt, D G; Ferguson, D W; Grubb, B P; Kapoor, W N; Kugler, J; Lerman, B B; Maloney, J D; Raviele, A; Ross, B; Sutton, R; Wolk, M J; Wood, D L (J Am Coll Cardiol, 1996)