BACKGROUND: The aim of the study was to analyse the mid-term outcomes of the frozen elephant trunk (FET) procedure for chronic aortic dissection (СAD). METHODS: From March 2012 to December 2022, 123 FET procedures were performed in patients with acute and chronic aortic dissection (CAD) as well as aortic aneurysm. Fifty-eight patients with CAD were eligible for study. CAD patients were divided into 2 groups: type A (n = 32) and type B (n = 26). Pre-, intra-, and postoperative data were collected retrospectively from electronic patient records, with a median follow-up period of 21.5 months (range 1-96 months). RESULTS: The overall 30-day mortality in CAD patients was 10.3%. The overall survival rate for the entire cohort was 66.5 ± 7.9%, and for type A and type B patients, respectively, it was 77.6 ± 8.1% and 53 ± 1.3% (P = 0.229). Distal stent graft-induced new entry developed in 2 (3.4%) patients. Freedom from composite outcome (death or/and distal aortic re-intervention) for the entire cohort was 56.8 ± 9.8%, and for type A and type B patients was 66.5 ± 1.2% and 44.8 ± 1.4%, respectively (P = 0.181). The incidence of stroke was 1.7%. Two patients (3.4%) had signs of spinal cord ischemia. Respiratory failure occurred in 14 patients (23.1%). The rate of dialysis was 15.5% (n = 9). The chest re-exploration for bleeding rate was 5.2% (n = 3). CONCLUSIONS: Early and late outcomes (death and/or distal aortic re-intervention) after the FET in CAD are tolerable without difference between type A and type B.