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OBJECTIVES Our goal was to evaluate the use of the frozen elephant trunk (FET) technique for the treatment of penetrating aortic ulcers involving the aortic arch. METHODS Between January 2008 and January 2020, a total of 34 patients had the FET technique at 3 aortic centres. The indication for the FET technique was unsuitability for thoracic endovascular aortic repair due to the lack of a sufficient proximal landing zone even after supra-aortic rerouting (subclavian transposition, double transposition), ectasia of the ascending aorta/aortic arch (&amp;gt;40 mm) and/or a shaggy proximal thoracic aorta. RESULTS Additional cardiac procedures were performed in 14 patients (41%), and the beating heart technique was used in 7 patients (21%). Perioperative mortality was 18% (n = 6); 3 of these patients had a major stroke (9%). No case of spinal cord ischaemia was observed, and 2 patients (6%) developed a non-disabling stroke. After a median follow-up of 7 (first quartile: 1; third quartile 29) months, 2 patients (6%) died (1 of malignant disease and 1 of an unclear cause); 10 additional aortic interventions in all aortic segments (29%; endovascular: n = 8 [24%] and conventional surgical: n = 2 [6%]) were performed in 8 patients. CONCLUSIONS The FET technique is a good treatment option for patients with penetrating aortic ulcers involving the aortic arch unsuitable for thoracic endovascular aortic repair. However, the high obliterative atherosclerotic load in these patients is accompanied by an un-neglectable risk of perioperative neurological injury. Concomitant cardiac surgical procedures are frequently needed. Patients commonly require secondary aortic procedures in all aortic segments, emphasizing the need for thorough primary conceptual planning and stringent follow-up.

Multicentre experience with the frozen elephant trunk technique to treat penetrating aortic ulcers involving the aortic arch