Learn More
Asymmetric digital subscriber lines (ADSLs) employ discrete multitone modulation (DMT) as transmission format, where subcarriers are assigned to the up- and/or downstream transmission direction. To separate up- and downstream signals, the ADSL standard allows the use of echo cancellation resulting in improved bit rates, reach, and/or noise margins. In(More)
BACKGROUND It has been shown that exercise-induced coronary vasodilation of angiographically normal coronary vessels is reduced in hypercholesterolemic patients. The purpose of this study was to evaluate the effect of calcium channel blockers on coronary vasomotion of angiographically smooth coronary arteries in hypercholesterolemic patients. METHODS AND(More)
Genes encoded on chromosome 6 within the major histocompatibility complex region are thought to play an important role in the pathogenesis of psoriasis. A potential candidate gene is tumor necrosis factor alpha. The tumor necrosis factor alpha promoter contains several polymorphisms including two G-->A transitions at position -308 and -238, which are the(More)
Ambulatory blood pressure and heart rate responses were obtained in 33 male paramedics during a 24-hour work shift to examine the effects of episodes of occupational stress on cardiovascular reactivity and subjective reports of stress. The aim of this study was to determine how individual differences in cynical hostility and defensiveness interacted with(More)
UNLABELLED We hypothesized that pacing at two ventricular sites simultaneously would activate the myocardium more rapidly and improve ventricular function. We studied the effect of pacing at the right ventricular outflow tract (RVOT) and the RV apex (RVA) on systolic and diastolic function. In 14 patients with a reduced systolic ejection fraction < 40%(More)
The role of coronary tortuosity in the pathophysiology of chronic pressure and volume overload is still unclear. A new method for measuring coronary tortuosity in patients with chronic pressure and volume overload was evaluated in 62 patients. Sixteen controls, 14 patients with arterial hypertension, and 32 patients with aortic regurgitation were included(More)
CD26 is a proteolytic enzyme (dipeptidylpeptidase IV) expressed on the T cell surface that defines an alternative activation signal for human T lymphocytes. Crosslinking of CD26 via monoclonal antibodies triggers proliferation and cytotoxicity in preactivated T cells. In this study, we used highly specific competitive and irreversible inhibitors of(More)
OBJECTIVE To investigate the association of microsatellites and single-nucleotide promoter polymorphisms (SNPs) in the gene for the cytokine interleukin-10 (IL-10) with susceptibility to and outcome of reactive arthritis (ReA). METHODS From genomic DNA, IL-10 microsatellites G and R and IL-10 promoter polymorphisms at positions -1087 and -524 were typed(More)
OBJECTIVE To examine immunological parameters that might explain disease discordance in monozygotic twin pairs with ankylosing spondylitis (AS). METHODS 11 monozygotic twin pairs (nine with AS, two with undifferentiated spondyloarthropathy) were investigated. The peripheral T cell receptor Vbeta repertoire was investigated using FACS analysis and 14(More)
The formation of a sulfuranyl radical intermediate followed by methyl transfer to the nickel(I) center of coenzyme F430 and generation of the disulfide has been proposed as a possible mechanism for the formation of methane catalyzed by methyl coenzyme M reductase in methanogenic archaea. In order to test this hypothesis, a sterically shielded, bifunctional(More)