Fig. 2. Kaplan-Meier curves of recurrent angina requiring coronary angiography between the two groups. Figure shows the cumulative incidences of recurrent angina requiring repeat coronary angiography. The diltiazem only group (indicated by dotted line) received diltiazem without nitrates. The dual group (indicated by black) received both of diltiazem and nitrates. CAS, coronary artery spasm.
