Endosuture aneurysm repair in patients treated with Endurant II/IIs in conjunction with Heli-FX EndoAnchor implants for short-neck abdominal aortic aneurysm.

OBJECTIVE

Endovascular repair of abdominal aortic aneurysm (AAA) remains a challenging clinical scenario when there is a short or nonexistent segment of healthy infrarenal aorta. This study sought to determine the safety and effectiveness of endosuture aneurysm repair (ESAR) using the Endurant II/IIs endograft (Medtronic Vascular, Santa Rosa, Calif) in conjunction with Heli-FX EndoAnchors (Medtronic Vascular) in the treatment of short-neck AAA.

METHODS

In this subgroup analysis, 70 patients were identified from the Aneurysm Treatment Using the Heli-FX EndoAnchor System Global Registry (ANCHOR) who had an infrarenal neck length <10 mm down to 4 mm based on core laboratory measurements. Primary outcomes included technical success of the index procedure, rate of type IA endoleak at 1 month and 12 months, and rate of secondary procedures at 12 months.

RESULTS

In this short-neck cohort (n = 70), the average neck length and diameter were 6.9 ± 1.6 mm and 25.7 ± 4.0 mm, respectively. Investigators reported an overall procedural success rate of 97.1% and a technical success rate of 88.6%. The duration of the implant procedure, EndoAnchor implantation, and total fluoroscopy time was 148.0 ± 80.0 minutes, 17.1 ± 11.5 minutes, and 35.3 ± 22.0 minutes, respectively, and an average of 5.5 ± 2.1 EndoAnchors were implanted per patient. Through the 30-day follow-up, type IA endoleaks were reported in four patients, of which three resolved spontaneously by the 12-month follow-up. There was an additional type IA endoleak through the 12-month follow-up that has not resulted in AAA enlargement or required a secondary procedure. The Kaplan-Meier estimate for freedom from secondary endovascular procedures and all-cause mortality is 95.4% and 92.7% through 365 days, respectively. No patient in the short-neck cohort experienced main body stent migration, increase in maximum aneurysm diameter, or aneurysm rupture or required conversion to open surgical repair through 12 months.

CONCLUSIONS

In this analysis of the short-neck cohort from ANCHOR, the Endurant II/IIs endograft in conjunction with Heli-FX EndoAnchor implants (ESAR) appears to be a safe and effective treatment option with a high technical success rate and low incidence of type IA endoleaks and secondary interventions. Despite the complex and hostile anatomies, the ESAR method required short procedure and fluoroscopy times. These short-term outcomes suggest that ESAR could be complementary to therapies currently available for treatment of hostile AAA anatomy and a viable off-the-shelf endovascular treatment option for patients with short-neck AAAs, although long-term follow-up is critically important.