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. 1998 Mar;79(3):230–233. doi: 10.1136/hrt.79.3.230

Self expandable stents for relief of venous baffle obstruction after the Mustard operation

S Brown 1, B Eyskens 1, L Mertens 1, L Stockx 1, M Dumoulin 1, M Gewillig 1
PMCID: PMC1728618  PMID: 9602654

Abstract

Objective—Obstruction of the venous pathways after Mustard repair for transposition of the great arteries is associated with an increased risk of arrhythmia and sudden death. The purpose of this study was to assess the effectiveness of the largest (tracheal 22 × 40 mm) Wallstents in treating baffle obstructions.
Design—Retrospective analysis of patients with stented venous pathways.
Subjects—Eleven patients with baffle obstruction after Mustard repair for transposition of the great arteries.
Interventions—Stenoses were dilated with an 18 or 20 mm balloon. However, recoil was noticed in 11 patients: immediately (n = 7) or on repeat angiography (n = 4). Eighteen stents were implanted (mean (SD)) 18 (3.3) years postoperatively. After dilatation a tracheal Wallstent (11.5 F) was deployed.
Main outcome measures—Relief of obstruction, haemodynamic improvement.
Results—In the inferior vena cava, 10 stents were deployed in seven baffle obstructions with an increase in diameter from 9.8 (2.4) mm to 16.5 (1.4) mm (p < 0.01) and a mean (SD) pressure gradient decrease from 5.1 (3.6) mm Hg to 1.4 (2.0) mm Hg; in the superior vena cava, eight stents were implanted increasing the diameter from 9.1 (3.7) mm to 15.6 (3.8) mm (p < 0.001) with a decrease in mean pressure gradient from 5.1 (2.7) mm Hg to 1.9 (1.5) mm Hg. No complications were experienced during implantation. No anticoagulation was prescribed. During follow up (1.7 (0.6) years; range, 0.9-2.6) no problems were noted; five patients were re-catheterised without change in measurements. There was no evidence of peal formation in any of the stents.
Conclusion—It is concluded that Wallstents are safe, easy to use, and effective in relieving baffle obstruction. Anticoagulation does not seem neccessary.

 Keywords: Mustard procedure;  venous baffle obstruction;  stent

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Figure 1  .

Figure 1  

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(A) Angiogram of IVC injection. There was a 6 mm Hg gradient across the pathway; note the prestenotic dilatation of the IVC. (B) Balloon dilatation with 18 mm balloon; there was complete disappearance of the waist, but repeat pull back showed no change of gradient across the pathway. (C) Partial deployment of the Wallstent: the outer sleeve is withdrawn for two thirds of the total length of the stent. At this point the stent is pulled into the ideal position, and the outer sleeve is further withdrawn until full expansion of the stent. (D) Full expansion of the stent; the shaft is carefully withdrawn. (E) Control angiogram showing good positioning of the stent; there was a residual gradient of 1 mm Hg.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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