Distal bare metal stent implantation during thoracic endovascular aortic repair is beneficial to treat complicated type B aortic dissection: A systematic review and meta-analysis

Stent-Assisted Balloon-Induced Intimal Disruption and Relamination in Aortic Dissection Repair (STABILISE): A Meta-Analysis of Early Outcomes

BACKGROUND

This meta-analysis aims to determine the early clinical outcomes and rate of complete false lumen obliteration associated with the stent-assisted balloon-induced intimal disruption and relamination in aortic dissection repair (STABILISE) technique in the management of aortic dissection.

METHODS

Electronic databases searches were performed on PubMed, Embase, and the Cochrane Library to identify studies reporting early outcomes of the STABILISE technique. In addition, we retrospectively analyzed all patients treated with the STABILISE technique for aortic dissection at our institution. The case series data were pooled with relevant studies to perform a meta-analysis of proportions using random-effects models.

RESULTS

One hundred and ninety two patients from 9 relevant studies were pooled with an additional 13 patients undergoing STABILISE at our institution over a 3-year period. Pooled in-hospital mortality rate was 6% [95% confidence interval (CI); 3%-10%, I2 = 0.00%] and the overall rate of intraoperative aortic rupture was 4% [95% CI; 2%-8%, I2 = 0.00%]. The rate of in-hospital reintervention was 8% [95% CI; 5%-14%, I2 = 13.37%]. Median follow-up ranged from 8 to 36 months. Pooled cumulative mortality at follow-up was 8% [95% CI; 4%-18%, I2 = 23.15%]. The overall rate of late reintervention was 11% [95% CI; 7%-17%, I2 = 0.00%]. Complete obliteration of the false lumen in the thoracic aorta was achieved in 93% of patients [95% CI; 84%-97%, I2 = 47.49%] and in the abdominal aorta in 86% of patients [95% CI; 79%-91%, I2 = 0.00%].

CONCLUSIONS

The STABILISE technique carries an acceptable operative safety profile with low in-hospital morbidity and mortality and excellent complete false lumen obliteration.

Five-year results of the STABLE II study for the endovascular treatment of complicated, acute type B aortic dissection with a composite device design

OBJECTIVE

To provide the five-year outcomes of the use of a composite device (proximal covered stent-graft + distal bare stent) for endovascular repair of patients with acute, type B aortic dissection complicated by aortic rupture and/or malperfusion.

METHODS

STABLE II was a prospective, multicenter study of the Zenith Dissection Endovascular System (William Cook Europe, Denmark). Patients were enrolled between August 2012 and January 2015 at sites in the United States and Japan. Five-year follow-up was completed by January 2020.

RESULTS

In total, 73 patients (mean age 60.7±10.9 years; 65.8% male) with acute type B dissection complicated by malperfusion (72.6%), rupture (21.9%), or both (5.5%) were enrolled. Patients were treated with either a composite device (79.5%) or the proximal stent-graft alone (no distal bare stent, 20.5%). Dissections were more extensive in patients who received the composite device (408.9±121.3 mm) than in patients who did not receive a bare stent (315.9±100.1 mm). Mean follow-up was 1209.4±754.6 days. Freedom from all-cause mortality was 80.3%±4.7% at one year and 68.9%± 7.3% at five years. Freedom from dissection-related mortality remained at 97.1%±2.1% from one-year through five-year follow-up. Within the stent-graft region, the rate of either complete thrombosis or elimination of the false lumen increased over time (82.1% of all patients at five years vs. 55.7% at first post-procedure CT), with a higher rate at five years in patients who received the composite device (90.5%) compared with patients without the bare stent (57.1%). Throughout follow-up, overall true lumen diameter increased within the stent-graft region, and overall false lumen diameter decreased. At five years, 20.7% of patients experienced a decrease in maximum transaortic diameter within the stent-graft region, 17.2% experienced an increase, and 62.1% experienced no change. Distal to the treated segment (but within the dissected aorta), 23.1% of patients experience no change in transaortic diameter at five years; a bare stent was deployed in all these patients at the procedure. Five-year freedom from all secondary intervention was 70.7%±7.2%.

CONCLUSIONS

These five-year outcomes indicate a low rate of dissection-related mortality for the Zenith Dissection Endovascular System in the treatment of patients with acute, complicated type B aortic dissection. Further, these data suggest a positive influence of composite device use on false lumen thrombosis. Continuous monitoring for distal aortic growth is necessary in all patients.

One-stage supraclavicular hybrid procedure for type B aortic dissection involving three rare anatomical anomalies: a case report and literature review

Managing type B aortic dissection (TBAD) involving Kommerell's diverticulum (KD), aberrant right subclavian artery (ARSA), and isolated left vertebral artery (ILVA), is extremely challenging. As treatment, we described a one-stage hybrid technique combined with thoracic endovascular aortic repair (TEVAR) with open surgery through a supraclavicular incision. A 57-year-old man with TBAD and the three anomalies successfully underwent hybrid TEVAR. A side-to-side artificial bypass between the ARSA and the right common carotid artery was established through a right supraclavicular incision before TEVAR. The release of the stent-graft was designed from the distal aortic ostium to the left common carotid artery (LCCA) to cover the ILVA, ARSA, and left subclavian artery (LSA). Then, the ILVA and LSA were transposed to the LCCA through a left supraclavicular incision. Intraoperative angiography confirmed complete false lumen exclusion and KD, with all branches patent and without endoleaks. Computed tomography angiography 7 days and 1 year postoperatively demonstrated well-perfused ARSA, LSA, and ILVA, and a fully expanded stent-graft with no endoleaks, migration, disconnection, or stenosis. TBAD involving KD, ARSA, and ILVA in one case is rare. This is the first report to treat this pathology with a one-stage supraclavicular hybrid procedure.