Instability of coronary lesions in unstable angina assessed by C-reactive protein values following coronary interventions.

The instability of coronary lesions was evaluated in 30 patients with stable angina and 60 patients with unstable angina. The grade of instability of coronary lesions as predicted by the increases in C-reactive protein induced by PTCA and/or stenting was closely correlated with Braunwald's classification of unstable angina.