Children's Memorial Hospital

About: Children's Memorial Hospital is a based out in . It is known for research contribution in the topics: Population & Transplantation. The organization has 5652 authors who have published 8967 publications receiving 283837 citations.

Comparison of anatomic isthmus block with the modified right atrial maze procedure for late atrial tachycardia in Fontan patients

Abstract: Background— Late atrial reentry tachycardia (AT) after Fontan repair is common, with limited efficacy of medical therapy in preventing AT recurrence. In this study, two approaches to surgical arrhythmia ablation in patients with refractory AT undergoing Fontan revision are compared: cryoablation of the inferomedial right atrium (RA), and a more extensive modified RA maze procedure designed to eliminate all potential RA reentrant circuits. Methods and Results— Fontan revision was performed in 23 patients with AT, using inferomedial RA cryoablation (Group 1, n=8) and modified RA maze procedure (Group 2, n=15). There was no difference in age at initial Fontan, age at Fontan revision, age at onset of AT, or number of failed antiarrhythmic medications. Patients underwent preoperative, intraoperative, and postoperative electrophysiological studies. Thirty-eight different tachycardia circuits were induced in preoperative studies with 3 major areas of RA involvement: the lower lateral RA, the atrial septum, and t...

Methamphetamine and Young Men Who Have Sex With Men: Understanding Patterns and Correlates of Use and the Association With HIV-Related Sexual Risk

Abstract: Objective To examine patterns, consequences, and correlates of methamphetamine use among adolescent and young adult men who have sex with men (YMSM). Design Descriptive, bivariate, and hierarchical regression analyses of cross-sectional data. Setting Howard Brown Health Center, a community-based facility in Chicago, Ill, from August 2004 to September 2005. Participants Three hundred ten YMSM who completed an anonymous, computer-assisted survey. Main Outcome Measure Methamphetamine use in the past year. Results Participants ranged in age from 16 to 24 years (mean age, 20.3 years); 30% were white and 70% were of other race/ethnicity (African American, 33%; Hispanic, 26%; Asian or Pacific Islander, 3%; and other, 8%). Participants reported many high-risk sexual and substance use behaviors. Thirteen percent used methamphetamine in the past year. Methamphetamine use was more common among human immunodeficiency virus–infected participants (odds ratio, 2.8; 95% confidence interval, 1.3-5.3) and varied by age and race/ethnicity; substantially higher prevalence was reported by older and non–African American YMSM (P Conclusions A substantial percentage of YMSM in this sample used methamphetamine. Methamphetamine use is a public health problem with significant implications for the health and well-being of YMSM. Methamphetamine use was associated with human immunodeficiency virus–related risk, and patterns of use were predicted by demographic data, sexualized social contexts, and psychological variables.

Identification of novel susceptibility genes in childhood-onset systemic lupus erythematosus using a uniquely designed candidate gene pathway platform

Abstract: Objective Childhood-onset systemic lupus erythematosus (SLE) presents a unique subgroup of patients for genetic study. The present study was undertaken to identify susceptibility genes contributing to SLE, using a novel candidate gene pathway microarray platform to investigate gene expression in patients with childhood-onset SLE and both of their parents. Methods Utilizing bioinformatic tools, a platform of 9,412 single-nucleotide polymorphisms (SNPs) from 1,204 genes was designed and validated. Molecular inversion probes and high-throughput SNP technologies were used for assay development. Seven hundred fifty three subjects, corresponding to 251 full trios of childhood-onset SLE families, were genotyped and analyzed using transmission disequilibrium testing (TDT) and multitest corrections. Results Family-based TDT showed a significant association of SLE with a N673S polymorphism in the P-selectin gene (SELP) (P = 5.74 × 10−6) and a C203S polymorphism in the interleukin-1 receptor–associated kinase 1 gene (IRAK1) (P = 9.58 × 10−6). These 2 SNPs had a false discovery rate for multitest correction of 95% probability of being considered as proven. Furthermore, 7 additional SNPs showed q values of <0.5, suggesting association with SLE and providing a direction for followup studies. These additional genes notably included TNFRSF6 (Fas) and IRF5, supporting previous findings of their association with SLE pathogenesis. Conclusion SELP and IRAK1 were identified as novel SLE-associated genes with a high degree of significance, suggesting new directions in understanding the pathogenesis of SLE. The overall design and results of this study demonstrate that the candidate gene pathway microarray platform used provides a novel and powerful approach that is generally applicable in identifying genetic foundations of complex diseases.

Skin involvement in juvenile dermatomyositis is associated with loss of end row nailfold capillary loops.

Abstract: OBJECTIVE: To determine associations of dermatological findings in children with juvenile dermatomyositis (JDM) with specific nailfold capillary (NFC) structural abnormalities. METHODS: Sixty newly diagnosed, previously untreated children who met the Bohan-Peter criteria for definite JDM were seen between 1993 and 2002. They were classified by duration of untreated disease and by a disease activity score (DAS) composed of separate subscores for dermatological (DAS skin) and musculoskeletal (DAS muscle) findings. Routine NFC measurements yielded the number of end row loops, arboreal (bushy), and dilated capillary loops. Laboratory testing included muscle enzymes, von Willebrand Factor Antigen, and neopterin. RESULTS: DAS skin, but not DAS muscle, was associated with NFC end row capillary loss (rs = -0.394, p = 0.008). End row capillary loss (reflecting avascularity), arboreal (bushy), and dilated capillary loops (reflecting change in vascular morphology) were each associated with longer untreated symptom duration (rs = -0.401, rs = 0.534, rs = 0.371). CONCLUSION: End row capillary loss measured by NFC was associated with the dermatological, but not musculoskeletal manifestations of JDM, suggesting that damage to skin and muscle may each have distinct disease pathophysiology. In JDM, skin involvement indicates a vasculopathy that progresses with increasing duration of untreated disease and is not revealed by standard serological laboratory tests. We propose that the cutaneous manifestations of JDM are associated with vascular disease and warrant aggressive therapy.