plasma markers of platelet activation ( beta-thromboglobulin , btg ) and of endothelium activity ( factor viii/von willebrand factor , fviii/vwf ) and plasma renin activity ( pra ) were determined in 17 healthy normotensive volunteers and in 21 hypertensives without target-organ damage before and after mental stress ( a colour-word conflict test ) .
C0032173
platelet activation
C1336938
vwf