Table 16.

Valsalva manoeuvre and clinical form

Valsalva	Classical (n = 86)	Z-RTT (n = 19)	Hanefeld (n = 12)	Congenital (n = 1)	ARTT-NOS (n = 17)
Mean (SD)	5.5 (9.8)	0.6 (0.7)	1.3 (1.9)	0.2 (−)	3 (7.8)
Range	0–53.2	0–2.1	0–6.8	–	0–32.8