Fig. 1. Kaplan-Meier curves of major adverse cardiac events (MACE) between the two groups. Figure shows the cumulative incidences of MACE includings composite of death, myocardial infarction, or de novo percutaneous coronary intervention MACE. 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.