Comparison of the predictive value of EuroSCORE, SYNTAX score, and clinical SYNTAX score for outcomes of patients undergoing percutaneous coronary intervention for unprotected left main coronary artery disease

Objectives: We aimed to assess the prognostic values of the EuroSCORE, SYNTAX score, and the novel Clinical SYNTAX score (CSS) for 30‐day and 1‐year outcomes in patients undergoing left main (LM) percutaneous coronary intervention (PCI). Background: PCI has become an alternative treatment for LM coronary artery disease, and risk scoring system might be beneficial for pre‐PCI risk stratification. Methods and Results: We enrolled 198 consecutive patients with unprotected LM disease undergoing PCI (mean age 71.5 ± 10.7 years). The CSS was calculated by multiplying the SYNTAX Score to (age/left ventricular ejection fraction +1 for each 10 mL the estimated glomerular filtration rate