Predictive factors of distal stent graft-induced new entry after frozen elephant trunk procedure for aortic dissection.

OBJECTIVES

The incidence rate of distal stent graft-induced new entry (d-SINE) after frozen elephant trunk technique for aortic dissection remains controversial. The aim of this study was to investigate the incidence and seek the clinical and anatomical predictive factors.

METHODS

This study is a retrospective multicentre evaluation of complications including d-SINE, aortic events and reintervention after the frozen elephant trunk procedure for aortic dissection.

RESULTS

Our cohort included a total of 177 consecutive patients who underwent the frozen elephant trunk procedure for acute and chronic aortic dissection at 5 centres in Japan from May 2014 to March 2021. The incidence rate of d-SINE was 14.1% (25/177 patients). The cumulative incidence of d-SINE was 7.1%, 12.4% and 21.4% after 12, 36 and 60 months, respectively. d-SINE was not associated with mid-term survival rate. After competing risk regression analysis, onset time >48 h (subdistribution hazard ratio, 3.80; 95% confidence interval, 1.13-12.79; P = 0.031) was detected as an independent predictor.

CONCLUSIONS

Awareness that there is a relatively higher incidence of d-SINE after frozen elephant trunk procedures is important. Non-hyper-acute phase was detected as an independent risk factor. Pre-emptive endovascular repair may be appropriate to protect new entry in high-risk patients.