Importance of Risk Assessment in Timing of Invasive Coronary Evaluation and Treatment of Patients With Non-ST-Segment-Elevation Acute Coronary Syndrome:Insights From the VERDICT Trial

Background The optimal timing of invasive examination and treatment of high‐risk patients with non–ST‐segment–elevation acute coronary syndrome has not been established. We investigated the efficacy of early invasive coronary angiography compared with standard‐care invasive coronary angiography on the risk of all‐cause mortality according to the GRACE (Global Registry of Acute Coronary Events) risk score in a predefined subgroup analysis of the VERDICT (Very Early Versus Deferred Invasive Evaluation Using Computerized Tomography) trial. Methods and Results Patients with clinical suspicion of non–ST‐segment–elevation acute coronary syndrome with ECG changes indicating new ischemia and/or elevated troponin, in whom invasive coronary angiography was clinically indicated and deemed logistically feasible within 12 hours, were eligible for inclusion. Patients were randomized 1:1 to an early (≤12 hours) or standard (48–72 hours) invasive strategy. The primary outcome of the present study was all‐cause mortality. Of 2147 patients randomized in the VERDICT trial, 2092 patients had an available GRACE risk score. Of these, 1021 (48.8%) patients had a GRACE score >140. During a median follow‐up of 4.1 years, 192 (18.8%) and 54 (5.0%) patients died in the high and low GRACE score groups, respectively. The risk of death with the early invasive strategy was increased in patients with a GRACE score ≤140 (hazard ratio [HR], 2.04 [95% CI, 1.16–3.59]), whereas there was a trend toward a decreased risk of death with the early invasive strategy in patients with a GRACE score >140 (HR, 0.83 [95% CI, 0.63–1.10]) ( P interaction =0.006). Conclusions In patients with non–ST‐segment–elevation acute coronary syndrome, we found a significant interaction between timing of invasive coronary angiography and GRACE score on the risk of death. Randomized clinical trials are warranted to establish the efficacy and safety among high‐risk and low‐risk patients with non–ST‐segment–elevation acute coronary syndrome. Registration URL: https://www.clinicaltrials.gov ; Unique identifier: NCT02061891.