Endovascular Repair of Aortic Arch Zones 0 to 2 Using Physician-Modified Endografts: A Systematic Review and Meta-Analysis

Abstract

Purpose:

The purpose of this study was to collect all the available evidence concerning technical success and early and mid-term clinical outcomes of physician-modified endografts (PMEGs) for the treatment of aortic arch pathologies in zones 0 to 2.

Material and methods:

We performed a systematic review to identify all the eligible studies that reported outcomes to the PMEGs for aortic arch pathologies in zones 0 to 2 and then conducted a qualitative synthesis and meta-analysis of the results. The main outcomes were technical success, mortality, stroke rate, bridging stents’ complications, and reintervention rate. We estimated pooled proportions and 95% confidence intervals (CIs).

Results:

A total of 134 study titles were identified by the initial search strategy, of which 14 (zone 0 n=6; zone 1 n=1; zones 1 t o2: n=7) were considered eligible for inclusion in the meta-analysis. A total of 777 patients (80% male; 62±6 years) were identified among the eligible studies. The pooled technical success for the PMEG in zone 0 was 96.6% (95% CI=93.9%-98.2%), whereas in zones 1 to 2 was 95.9% (95% CI=92.9%-97.6%). The pooled 30-day mortality was 4.6% (95% CI=2.0%-10%) and 4.3% (95% CI=2.2%-8.2%) for zones 0 and 1 to 2, respectively, whereas the prevalence of late mortality was 8.2% (95% CI=4.7%-14%) and 3.4% (95% CI=1.9%-6%). The pooled stoke rate was 3.7% (95% CI=2.1%-6.4%) in zone 0 and 2.7% (95% CI=1.4%-5%) in zones 1 to 2. The early reintervention rate was 3.5% (95% CI=1.5%-8.0%) and 4.2% (95% CI=2.4%-7.2%) for zones 0 and 1 to 2, respectively, whereas during the mean follow-up of 26 months was 8.5% (95% CI=3.0%-21%) and 1.9% (95% CI=0.8%-4.3%). The pooled bridging’s stent instability was 3.9% (95% CI=1.1%-12.9%) in zone 0 and 3.2% (95% CI=1.8%-5.8%) in zones 1 to 2.

Conclusions:

Endovascular repair of aortic arch pathologies using PMEGs seems to present a satisfactory level of technical success and a low mortality rate. To attain clearer conclusions, further research employing randomized controlled trials, longer-term follow-up, and consistent reporting of results is warranted.

Clinical Impact

This systematic review and meta-analysis of observational studies analyzed the short- and mid-term outcomes of aortic arch aneurysm and/or dissection using physician-modified endografts. It separately examined the outcomes from zones 0 and 1-2 of the aortic arch. Fourteen studies (n=777 patients) were included. Overall technical success rates were 96.6% for zone 0 and 95.9% for zone 1-2. Regarding early mortality and stroke rates, no significant differences were observed, while late mortality was higher in patients in zone 0. The late reintervention rate favored patients treated with PMEGs in zone 1-2. The physician-modified technique appears to be an excellent and rapidly available alternative for the treatment of aortic arch diseases.