Key result
ePTFE conduits for EC-TCPC show ~230% greater calcification along the lesser versus greater curvature.
Why the study?
The long-term structural integrity of ePTFE conduits used for EC-TCPC is not well established, and quantitative data on conduit calcification remain limited.
What are the long-term structural changes and calcification patterns in ePTFE conduits used for EC-TCPC in Fontan patients?
Cohort (n=20)
What are the long-term structural changes and calcification patterns in ePTFE conduits used for EC-TCPC in Fontan patients?
Long-term ePTFE conduits in Fontan patients exhibit curvature-specific vulnerability to calcification, which is associated with reduced conduit cross-sectional area, highlighting the need for structural surveillance.
Answers are grounded in this paper and cite their sources.
Long-term ePTFE conduit CSA data in EC-TCPC remain limited; leaves open durability questions for prospective study.
The long-term structural integrity of expanded polytetrafluoroethylene (ePTFE) conduits used for extracardiac total cavopulmonary connection (EC-TCPC) is not well established. Although conduit calcification has been reported, quantitative data remain limited. We retrospectively analyzed 20 EC-TCPC patients who underwent computed tomography more than 5 years after Fontan completion (median: 13.7 years). Cross-sectional area (CSA) was measured at five sites and expressed as a percentage of the original CSA (%CSA), and calcification volume was indexed to body surface area. Median values of mean and minimum %CSA were 74.0% and 65.5%, respectively. %CSA correlated inversely with calcification volume index (ρ = −0.47, P = 0.04). Calcification was greater along the lesser curvature than the greater curvature (0.66 vs. 0.20 mm 3 /m 2 , P < 0.001). These findings suggest curvature-specific vulnerability in ePTFE conduits and support the importance of long-term structural surveillance in Fontan patients.
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Cao et al. (2026) conducted a cohort in Extracardiac total cavopulmonary connection (EC-TCPC) (n=20). ePTFE conduits vs. Greater curvature was evaluated on Calcification volume indexed to body surface area (lesser vs. greater curvature) (p=<0.001). In patients with ePTFE conduits for EC-TCPC, calcification was significantly greater along the lesser curvature compared to the greater curvature (0.66 vs. 0.20 mm3/m2, P<0.001).
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