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In cardiac transplantation, the donor organ is not initially innervated and demonstrates decreased heart rate variability (HRV). However, HRV may improve after several months. The mechanism for HRV improvement has not been elucidated; autonomic reinnervation of the donor heart has been proposed. The role of atrioatrial conduction from recipient to donor organ has not been evaluated. We prospectively...
Background: As balloon dilation of native aortic coarctation (CoA) remains controversial, we sought to determine if the biophysical properties of the dilated CoA segment affect outcomes.Methods: From 6/88 to 12/96, 69 patients had percutaneous transcatheter dilation of CoA, at a median age of 5.8 yrs (range, 6 mo to 16.8 yrs). Hemodynamic data and angiographic dimensions were recorded, and follow-up...
Background: Management of isolated aortic valve stenosis (AVS) requiring intervention at age <3 mo is controversial. We sought to define factors associated with outcomes after neonatal presentation.Methods: From 1/85 to 12/96, 62 infants presented with AVS at <3 mo of age; 7 were excluded due to significant mitral valve abnormalities (4 died). Clinical, echo, hemodynamic and angiographic,...
Background: Extracardiac conduits between the RV and pulmonary arteries commit patients to multiple reoperations. Endovascular stenting of a stenotic conduit may delay reoperation.Methods: From 790 to 597, 42 patients underwent transcatheter stent insertion to relieve RV conduit stenosis. Median age at procedure was 5.9 yrs (range, 6 mo-17 yrs), with a median interval from conduit insertion of 2...
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