INS and heart failure: We further a univariate analysis of the risk factors known to favor the development of surgical site infections and DSWI, like patient-related factors (smoking, alcohol consumption, diabetes mellitus and insulin intake, myocardial infarction, heart failure, endocarditis, ASA classification) or surgery-related factors (coronary bypass surgery, heart valve surgery, and prosthetic aortic replacement) [6], without finding a statistical correlation.