Evaluation of coronary microvascular function in patients with vasospastic angina

Table 3 Quantitative coronary angiography and Doppler flow velocity (mean ± SD)

	NonVSA Group	VSA Group	P value
Heart rate at baseline (/min)	67 ± 13	67 ± 9	NS
Mean arterial pressure (mmHg)	107 ± 11	103 ± 16	NS
Coronary artery diameter (mm)
Baseline	3.14 ± 0.48	2.95 ± 0.55	NS
Acetylcholine 3 μg/min	3.24 ± 0.55	2.90 ± 0.59	0.013
Nitroglycerin infusion	3.57 ± 0.65	3.43 ± 0.55	NS
Coronary blood flow (mL/min)
Baseline	94 ± 48	84 ± 69	NS
Acetylcholine 3 μg/min	153 ± 15	130 ± 15	NS
Average peak velocity (cm/s)
Baseline	21 ± 8	21 ± 12	NS
After ATP infusion	63 ± 25	64 ± 24	NS

VSA: Vasospastic angina; NS: Not significant; ATP: Adenosine triphosphate.