Comparison of clinical outcomes in patients with mixed angina and pure vasospastic angina

Objective This study investigated differences in clinical outcomes between mixed angina (MA) and pure vasospastic angina (PVA). Methods A total of 524 vasospastic angina patients who did or did not have >50% coronary artery stenosis from January 2005 to January 2021 were divided into two groups (Group 1: PVA, N = 399; Group 2: MA, N = 125) and then three groups [Group 1: PVA, N = 399; Group 2: MA without percutaneous coronary intervention (PCI), N = 67; Group 3: MA with PCI, N = 58] for assessment. We recorded the incidence of major adverse cardiac and cerebrovascular events (MACCE: the composite of death, myocardial infarction, nonfatal stroke or rehospitalization) during 3-year clinical follow-up. Results Compared to the PVA group, there were significant differences in MACCE (20.8% vs. 11.8%, P = 0.011) and rehospitalization (20.0% vs. 9.8%, P = 0.002) in the MA group. Kaplan-Meier analysis showed that patients in the MA with PCI group had the highest cumulative incidence rate of MACCE during the 3-year follow-up (log-rank P < 0.001). Conclusion Compared with the PVA patients, MA patients had significantly worse clinical outcomes during long-term follow-up.