Michael Walter

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UNLABELLED This study was performed to determine the secretion pattern and prognostic value of A-type (ANP) and B-type (BNP) natriuretic peptide in patients undergoing cardiac surgical procedures. We measured ANP and BNP in patients undergoing coronary artery bypass grafting (CABG) with (n = 28) or without (n = 32) ventricular dysfunction and in patients(More)
In this paper, we present improvements of the algebraic side-channel analysis of the Advanced Encryption Standard (AES) proposed in the works of M. Renauld and F.-X. Standaert. In particular, we optimize the algebraic representation of both the AES block cipher and obtained side-channel information, in the form of Hamming weights of intermediate states, in(More)
OBJECTIVE To determine the potential role of atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) in the pathogenesis of cerebral salt wasting. DESIGN Clinical case report. SETTING Regional pediatric intensive care unit. PATIENT A 3-yr-old boy with a cerebral infarct secondary to traumatic carotid artery dissection who developed(More)
Malnutrition can be an important risk factor, especially in patients undergoing major gastrointestinal surgery. With 7–10 days of adequate preoperative parenteral nutrition, we are able to improve the nutritional status of most patients. Concentrations of several parameters of the protein compartment and immunocompetence increase significantly. The effect(More)
HDL plasma concentrations decline with age in prospective studies. Decline in HDL concentration and function may occur secondary because of hormonal changes, inflammatory processes, and diabetes mellitus. Beyond these effects specific aging processes may be involved. Replicative aging, the telomere-driven loss of divisional capacity, is a species-specific(More)
Low density lipoprotein (LDL) and fibrinogen apheresis was recently reported to be an effective therapy in sudden hearing loss (SHL). In this study, we investigated whether lipoprotein and/or fibrinogen plasma concentrations, related gene polymorphisms and other cardiovascular risk factors are also risk factors for SHL. Total cholesterol, HDL and LDL(More)
HYPOTHESIS To evaluate the effects of high thoracic epidural anesthesia (TEA) on global and regional myocardial function and on perioperative coronary risk in patients undergoing coronary artery bypass grafting. DESIGN, SETTING, AND PATIENTS Prospective and randomized clinical trial blinded for the primary outcome measure of 73 patients scheduled for(More)
Hutchinson-Gilford progeria syndrome (HGPS) is an important model disease for premature ageing. Affected children appear healthy at birth, but develop the first symptoms during their first year of life. They die at an average age of 13 years, mostly because of myocardial infarction or stroke. Classical progeria is caused by the heterozygous point mutation(More)
AIMS It has recently been proposed that anaemia is an independent risk factor for development of cardiovascular disease in the general population. The impact of anaemia on long-term survival of patients with manifest coronary heart disease (CHD) has not been assessed so far. In this study, we examined the influence of haemoglobin concentrations on the(More)