Compared with patients in the non-myocardial injury group, patients in the myocardial injury group have a higher prevalence of cardiovascular risk factors (including senior age and higher proportion of smoking), a higher prevalence of comorbidities (such as previous coronary artery disease, hypertension, atrium fibrillation and diabetes, and a higher rate of premedication (such as anticoagulation, β-blocker, Angiotensin-converting enzyme inhibitor/Angiotens in II receptor blocker, and diuretic) (all with P-value < 0.05). This evidence concerns the gene ACE and diabetes mellitus.