TNNI3 and Cowden syndrome 1: According to the SCAI shock classification, in the CS group, two patients were in stage A, seven patients in stage B, and eight patients in stage C. There were no significant differences in the demographics, comorbidities, risk factors, pain-to-balloon time, PCI procedures or maximum levels of cTnI and CKMB, between patients with and without CS (Table 1, all p > 0.05).