. Author manuscript; available in PMC: 2008 Dec 5.

Published in final edited form as: Arterioscler Thromb Vasc Biol. 2007 Aug 23;27(10):2113–2119. doi: 10.1161/ATVBAHA.107.147322

Table 2.

Brachial Ultrasound Results

	No Event (n=217)	Event (n=50)	P
Baseline
Brachial diameter, mm	4.06±0.87	4.11±0.91	0.72
Flow volume, mL/min	156±114	142±108	0.45
Flow velocity, cm/s	20±14	17±10	0.18
Shear stress, dyne/cm²	14±11	12±7	0.13
Hyperemic
Flow volume, mL/min	788±562	650±490	0.11
Flow velocity, cm/s	95±50	75±39	0.004
Shear stress, dyne/cm²	68±39	53±30	0.004
Change from baseline
Flow-mediated dilation, %	6.9±4.6	4.5±3.0	<0.001
Flow-mediated dilation, mm	0.27±0.17	0.18±0.11	<0.001
Nitroglycerin-mediated dilation, %^*	11.5±6.7	7.6±5.3	0.02
Change in flow volume, %	472±330	438±319	0.52

n=86 for nitroglycerin-mediated dilation. The remainder of subjects had a contra-indication or declined to take nitroglycerin.