Publications by authors named "Karmanski A"

Oxidative stress reflects an imbalance between the systemic manifestation of reactive oxygen species and cells' ability to neutralize them by antioxidant systems. The role of oxidative stress in hypertrophic cardiomyopathy (HCM) is not fully understood. The aim of the study was to examine selected parameters of oxidative stress in patients with HCM compared to the control group.

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Background: Growth differentiation factor-15 (GDF-15) is a hormone that regulates inflammatory responses, tissue repair, and cardiac remodeling, the three key processes underlying the development and progression of heart failure (HF). Furthermore, GDF-15 integrates information from cardiac and extracardiac disease pathways that are linked to multiorgan dysfunction in advanced stages of HF.

Aim: This study aimed to determine which factors are associated with one-year mortality in patients with end-stage HF, with particular emphasis on GDF-15.

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Introduction: Accurate risk assessment in patients with heart failure (HF) is crucial. Developing new models that combine biochemical and clinical variables with novel biomarkers is the best approach to improving the management and prognostic evaluation in this population.

Objectives: We aimed to assess and compare the predictive utility of a new prognostic scale, the Barcelona Bio‑Heart Failure (BCN Bio‑HF) risk calculator, as well as traditional risk scores, the Heart Failure Survival Score (HFSS) and the Seattle Heart Failure Model (SHFM), in patients with end‑stage HF.

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The role of oxidative/antioxidative system imbalances in advanced heart failure (HF) has not been fully investigated. The aim of this study was to identify factors associated with one-year mortality in patients with advanced HF, with particular emphasis on oxidative/antioxidative balance parameters. We analyzed 85 heart transplant candidates who were hospitalized at our institution for right heart catheterization.

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We report a rare case of spontaneous epidural accumulation of air in the occipital region resulting from an unusual hyperpneumatization of the cranium in a 37-year-old miner. For suspected subarachnoid haemorrhage the patient was admitted to neurological department. Performed computed tomography (CT) revealed extensive hyperpneumatization of the cranium, involving also the upper part of the cervical vertebral column, and epidural pneumocephalus.

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The infrafascicular blood vessels of the sciatic nerve were investigated in 36 nerves obtained during autopsy from males and females aged 20-72 years. Arteries of fasciculi form intrafascicular vascular net. The number of venous vessels draining blood from fasciculi is much greater than arterial vessels.

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The thoracic and lumbosacral parts of the rat's spinal cord are supplied by 1) ventral and dorsal radicular arteries which contribute to vascular trunk passing along the spinal cord, and 2) ventral and 2) dorsolateral spinal arteries. The dorsal radicular arteries in the thoracic part arise bilaterally at the same level and are more numerous and of lesser diameter than corresponding ventral radicular arteries. In the lumbar part the dorsal radicular arteries are also more numerous than ventral ones which were mainly found at the levels of L1, L2 and L3.

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The number, diameter and structure of the capillary vessels differ in particular parts of the spinal cord. Density of the vascular net is much greater within the gray substance. Also the density differs in particular parts of the gray substance at the same spinal level.

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In 54 Wistar rats the number, diameter, and topography of veins on the ventral and dorsal surfaces of the spinal cord were investigated. The spinal cord in rats possesses well developed venous net forming meningeal venous system. The veins pass independently of arteries and they consists of single trunks with intervals passing on the ventral and dorsal surfaces of the spinal cord as well as dorsal and ventral radicular veins draining to the epimeningeal venous plexus.

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Effects of long-term low frequency vibrations on the structure of the sciatic and plantar nerves were examined in Wistar strain rats. Decrease in total number of nerve fibers was noted. This was associated with altered distribution of myelinated fiber diameters, disturbances in axon structure and with fiber demyelination.

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Investigations were performed in 36 rats of Wistar strain. In 50% of cases the accessory arteries originating from the vertebral artery and connections of the ventral spinal artery with the first radicular arteries were found. The dorsal spinal arteries always originated from the intracranial part of the vertebral artery, and in many instances their discontinuity at the level of C4--C6 was observed.

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Each ganglion of the cervical part of the sympathetic trunk in white rat is supplied by several arteries of diameter of 15--30 micrometers. The arteries arise from three sources: 1) large vessels adjacent to the ganglia, 2) vascular net of connective and muscular tissues surrounding the ganglion, 3) vessels of nerves and interganglionic rami. The vascular network of the cervical sympathetic ganglia was connected with the vascular plexus of the vagus nerve and cervical as well as brachial plexuses.

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Density of capillary network was examined in the course of nerves of frontal and rear extremities in the white rat, in various portions of the nerves. At the same levels, number of nervous fibers per mm2 of the area was scored as well as diameters of myelinated fibers was recorded in proximal and distal fragments of chosen nerves. Decreased density of capillary network was detected in peripheral portions of the nerves, which was paralleled by an increase in number of myelinated fibers and a decrease in their diameter.

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Sources of blood supply and structure of vascular network were described in nerves of forelimbs and hindlimbs of 30 Wistar strain rats. The vessels were injected through the left ventricle of the heart with aqueous solution of gelatin, stained with black ink. Following fixation in formaldehyde samples were taken at various points of the median, ulnar, radial, musculocutaneous, femoral, nerves and their terminal branches.

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The sources of blood supply of the human sciatic nerve were investigated in 32 nerves from 28 cadavers (16 men and 12 women). It was shown that the sciatic nerve is supplied by 4-8 nutrient arteries arising from inferior gluteal, medial circumflex femoral, perforating and popliteal arteries.

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Blood vessels were examined within epineurium of 38 ischiadic nerves from corpses of men and women aging 26 to 65 years. The studies demonstrated that large eyeholed and fine meshed vascular plexuses are formed in both components of ischiadic nerve. The plexus maintain communication with axial arterial and venous vessels which run in the outer layer of epineurium and with interfascicular vessels located in connective tissue of interfascicular epineurium.

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The study aimed at determining types of interventricular septal branches stemming from the anterior interventricular branch of the left coronary artery. The studies were performed on 28 preparations of human heart aging 29 to 88 years. The technique of direct preparation was applied using a dissecting microscope.

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