sGPVI is elevated in patients with stable single vessel coronary disease. Ten patients with SAP and single vessel coronary disease (mean % diameter stenosis, 57.0% ± 2.9%) confirmed by quantitative coronary angiography and 10 age-matched controls were assessed for plasma sGPVI levels. sGPVI levels were significantly higher in the SAP group than in the control group (62.0 ± 7.5 vs 36.8 ± 5.5 ng/mL, mean ± SEM, P = .014, unpaired t test). *P < .05.