Polski merkuriusz lekarski : organ Polskiego Towarzystwa Lekarskiego
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Pol. Merkur. Lekarski · Oct 2006
Review[Genetic factors in susceptibility to age- and noise-related hearing loss].
Individual susceptibility to age-related hearing loss (AHL) and noise-induced hearing loss (NIHL) varies greatly, and this inter-individual variation is due to an interaction of environmental factors, individual factors, and susceptibility genes. Majority of studies on susceptibility genes for AHL and NIHL have been performed in mice model. These findings suggest the role of the same genes in the development of AHL and NIHL, the more so as the pathogenesis of both diseases is similar with a crucial role of oxidative stress. ⋯ An increased susceptibility to AHL and NIHL may rely on the SNPs of several other genes, including the groups of oxidative stress genes, K+ ions recycling genes, monogenic deafness genes (including Connexin 26 gene, which mutation is responsible for the most frequent hereditary deafness in Caucasians), as well as mitochondrial genes. Several oxidative stress enzyme (sod1-/-, gpx -/-) knock-out mice have been shown to be more susceptible to NIHL than wild strains. Current large-scale cohort studies on AHL and NIHL performed under the European projects in between-lab collaboration along with a dynamic progress in the field of genetics of deafness open up new opportunities to find human AHL and NIHL susceptibility genes and develop methods for AHUNIHL treatment.
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Pol. Merkur. Lekarski · Oct 2006
Case Reports[Sudden cardiac arrest as the first symptom of coronary heart disease--case report].
We describe the patient at whom sudden cardiac arrest was the first symptom of coronary heart disease. In the paper, we describe factors which influence the effectiveness of resuscitation in out of hospital cardiac arrest. Applying the cardiac massage by a bystander, the presence of defibrillation rhythm and short period of time to the first defibrillation, determined the survival of the patient.