Table 2 Results of carotid sinus massage in subjects with carotid sinus hypersensitivity and unexplained falls

	Patients with unexplained falls (n = 34)
CSH subtype	CI 15 (44%)
	Mx 17 (50%)
	U 2 (6%)
Mean max asystole (s) (SD)	5.06 (1.5)
Mean max VD (mm Hg) (SD)	76.7 (35.2)
VD postatropine (n = 19)
Mean VD supine (mm Hg) (SD)	73.4 (15.1)*
Mean VD upright (mm Hg) (SD)	87.2 (18.6)
Laterality of initial positive CSM	24 (71%) right
Initial CSM positive upright	20 (59%)
LOC during CSM	22 (64%)
Amnesia for LOC	21 (95% of LOC) 12 (57%) upright

*p = 0.000034.
CI, cardioinhibitory; CSH, carotid sinus hypersensitivity; CSM, carotid sinus massage; LOC, loss of consciousness; max, maximum; Mx, mixed; U, unclassifiable; VD, vasodepressor response.