The Efficacy of Second-Stage Endovascular Repair Strategy for Acute Type A Aortic Dissection

Abstract

Purpose:

To evaluate the usefulness of a hybrid treatment strategy for acute type A aortic dissection (AAAD).

Methods:

We retrospectively evaluated the outcomes of 39 partial arch replacements (PAR; 26 male/13 female, mean age=67.9 years) in 62 patients with AAAD operated at our hospital from January 2019 to January 2023. The technique included PAR with graft-designed landing length and translocated the brachiocephalic artery inflow site during the initial surgery to minimize the invasiveness of the surgery. Thereafter, second-stage thoracic endovascular aortic repair (second TEVAR) for distal aortic events in the chronic phase was performed.

Results:

There was 1 case of 30-day mortality (2.6%) and 2 cases of postprocedural cerebral infarction (5.1%). The cumulative survival rates were 97.4%/1 year and 97.4%/3 years. The cumulative freedom from aorta-related second-stage procedure for the distal aortic event after initial PAR, which was performed in 13 patients (33.3%), was 63.9%/1 year and 59.7%/3 years. All patients requiring re-intervention after initial PAR underwent a second TEVAR with a 100% success rate and no postoperative complications.

Conclusion:

Initial PAR for AAAD in anticipation of the second TEVAR is a valuable strategy for enabling minimally invasive additional treatment of aorta-related re-intervention for distal aortic events in the chronic phase.

Clinical Impact

This study provides detailed information on the hybrid aortic repair strategy of the initial open partial arch repair and second staged endovascular repair for the acute type A aortic dissection. Based on this study, distal aortic re-intervention after initial open partial arch repair was necessary only in about 30% of cases, and no cases of SCI were observed in the initial treatment or in the second-stage endovascular repair and no cases of distal SINE were observed after the second staged endovascular repair. Overall, the results suggest that limiting the initial open partial arch repair can achieve good perioperative and early outcomes of initial surgery, and that second staged endovascular re-intervention for distal aortic events can be performed reliably, safely, and with minimal invasiveness.

Keywords

acute aortic dissection type A second-stage TEVAR partial arch replacement

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