No abstract

No abstract

Background Adult congenital heart disease (CHD) transplant recipients historically experienced worse survival early after transplantation. We aim to review updated trends in adult CHD transplantation. Methods We performed a single center case series of adult cardiac transplants from January 2013 through July 2020. Outcomes of patients with CHD were compared to non‐CHD. The primary outcome was overall survival. Secondary outcomes included a variety of post‐operative complications. Results 18/262 (7%) transplants were CHD recipients. CHD patients were younger with median age 41 (32—47) versus 58 (48–65) (P < .001). Fontan circulation for single ventricle physiology was present in 4/18 (22%) of CHD recipients, while 16/18 (89%) had systemic right ventricles. CHD recipients had higher rates of previous cardiovascular operations (94% vs. 51%, P < .001). 9/18 (50%) of CHD patients required reconstructive procedures at the time of transplant. Operative and cardiopulmonary bypass times were longer for the CHD cohort (7.5 h [6.6–8.5] vs. 5.6 h [4.6–7] P < .001) and (197 min [158–240] vs. 130 [105–167] P < .001), respectively. There were no differences in operative complications or survival between CHD and non‐CHD recipients. Conclusions These data highlight the added technical challenges of performing adult CHD transplants. However, similar outcomes can be achieved as for non‐CHD recipients. Summary Modern advances in palliation of congenital heart defects (CHD) has led to increased survival into adulthood. Many of these patients require heart transplantation as adults. There are limited data on adult CHD transplantation. Historically, these patients have had worse perioperative outcomes with improved long‐term survival. We retrospectively analyzed 262 heart transplants at a single center, 18 of which were for adult CHD. Here, we report our series of 18 CHD recipients. We detail the palliative history of all CHD patients and highlight the added technical challenges for each of the 18 patients at transplant. In our analysis, CHD patients had more prior cardiovascular surgeries as well as longer transplant operative and bypass times. Despite this, there were no differences in perioperative and long‐term outcomes. We have added patient and institution specific data for transplanting patients with adult CHD. We hope that our experience will add to the growing body of literature on adult CHD transplantation.

No abstract

This research describes thiol-ene/epoxy hybrid networks for core-shell encapsulation of semiconductor devices. A thiol-ene network was formed using ultraviolet-induced radical polymerization, with unreacted thiols and epoxide monomers remaining in the network. Immersion in tributylamine catalyzed the thiol-epoxy coupling to produce a diffusion-limited hard outer shell. Tensile testing shows that the initial thiol-ene product (core) has elastomeric behavior, while the secondary curing creates a glassy material (shell) at room temperature due to thiol-epoxy coupling. Bulk samples of the material form a hard outer shell surrounding a soft core depending on the secondary cure conditions. There are positive relationships between wall thickness and secondary cure temperature and cure time, enabling control of shell thickness by varying reaction conditions. Shell thicknesses were measured up to 1.8 mm when immersed in tributylamine for up to 150 minutes and up to 140 °C. The ability to control core-shell thickness of dual-cured networks is applicable in device encapsulation processes. Core-shell encapsulants for microelectronics may provide further shock and impact protection for durable electronic devices. Further aging and operational studies will be needed to determine time-stability and optimal processing of the core-shell structure.