Acute treatment of critical vascular stenoses with a bioabsorbable magnesium scaffold in infants with CHDs.

Abstract:

BACKGROUND:Post-operative severe vascular stenosis and proliferating endothelial tissue lead to severe circulatory disorders and impair organ perfusion. Bioabsorbable magnesium scaffolds may help to overcome these obstructions without leaving obstructing stent material. We analyse their role in the treatment of vascular stenosis in infants. METHODS:Since 2016, 15 magnesium scaffolds with a diameter of 3.5 mm were implanted in 9 patients aged 15 days to 7.6 years. Eight scaffolds were implanted in pulmonary venous restenoses, five in pulmonary arterial stenosis including one in-stent stenosis, one into a stenotic brachiocephalic artery, and one in a recurrent innominate vein thrombosis. RESULTS:All patients clinically improved after the implantation of a scaffold. The magnesium scaffolds lost integrity after 30-48 days (mean 42 days). The innominate vein thrombosed early, while all other vessels remained open. Two patients died after 1.3 and 14 weeks not related to the scaffolds. Five patients needed further balloon dilations or stent implantations after the scaffold had fractured. At first recatheterisation after in mean 2.5 months, the mean minimum/maximum diameter in relation to the scaffold's original diameter was 89%/99% in the arterial implantations (n = 6) and 66%/77% in the pulmonary venous implantations. CONCLUSIONS:The magnesium scaffolds can be used as a bridging solution to treat severe vascular stenosis in different locations. Restenosis can occur after degradation and make further interventions necessary, but neither vessel growth nor further interventions are hindered by stent material. Larger diameters may improve therapeutic options.

journal_name

Cardiol Young

journal_title

Cardiology in the young

authors

Zartner PA,Schranz D,Mini N,Schneider MB,Schneider K

doi

10.1017/S1047951120000384

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

493-499

issue

4

eissn

1047-9511

issn

1467-1107

pii

S1047951120000384

journal_volume

30

pub_type

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