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  • 1
    Electronic Resource
    Electronic Resource
    Autonomic Denervation After the Maze Procedure (2003)
    350 Main Street , Malden , MA 02148-5018 , USA . : Blackwell Futura Publishing, Inc.
    Pacing and clinical electrophysiology 26 (2003), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: LÖNNERHOLM, S., et al.: Autonomic Denervation After the Maze Procedure. The Maze III procedure is a surgical operation for curative treatment of AF. The procedure is extensive, however, with multiple incisions in both atria, and its effects on autonomic regulation of the heart rhythm are not known. This study comprises 17 patients, 10 with paroxysmal AF and 7 with chronic AF, who had no concurrent cardiac disease known to affect heart rate variability (HRV). A 24-hour Holter recording was performed preoperatively and 2 months (early) and 7 months (late) after surgery, for analysis of HRV in the time and frequency domains. Early after the Maze procedure all HRV components were markedly reduced compared to baseline (mean ± 1 SD): SDNN 73 ± 13 versus 148 ± 50 (ms), total power 168 ± 126 versus 560 ± 1567 (ms2), low frequency (LF) power 47 ± 67 versus 826 ± 677 (ms2), high frequency (HF) power 47 ± 40 versus 678 ± 666 (ms2), and LF:HF 1.22 ± 0.9 versus 2.55 ± 1.4 . Late after the Maze procedure all variables were still reduced. Only total power increased significantly between early and late follow-up ( 168 ± 126 vs 496 ± 435 ms2). Late after Maze surgery, values of the different HRV components did not differ between the patients with paroxysmal AF and chronic AF. Early after the Maze procedure there is a marked decrease of all HRV components, which is maintained 7 months after surgery, a pattern consistent with denervation of the heart. (PACE 2003; 26[Pt. I]:587–592)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.00098.x
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of Two Blood Conservation Techniques (Cardiotomy Reservoir Versus Cell-Saver) on Biocompatibility of the Heparin Coated Cardiopulmonary Bypass Circuit During Coronary Revascularization Surgery (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 12 (1997), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract Blood conservation during cardiac surgery is critically important because of the inherent risks in homologous blood transfusions. Two techniques for the intraoperative conservation of blood—retransfusion of the red cells using a cell-saver (CS), or retransfusion of the blood using a cardiotomy suction (CTR) system—were compared using biocompatibility markers, granulocyte activation, and production of oxygen-free radicals (OFR). In the CTR group, heparin coated circuits with an uncoated cardiotomy reservoir were used. For the CS group, identical heparin coated cardiopulmonary bypass (CPB) sets, without a cardiotomy reservoir but with a CS, were used. In each group, eight patients had coronary artery bypass grafting performed. The capacity of the whole blood and the granulocytes to produce OFR was estimated by a chemiluminescence, and granulocyte activation was measured as release of the granulocyte granule proteins myeloperoxidase (MPO) and lactoferrin. A significantly reduced capacity to produce OFR by the whole blood was noted at 45 minutes of CPB in the CTR group (68%± 17% vs 94%± 16% in the CS group). MPO release was higher after 3 hours (p = 0.05) and 20 hours (p 〈 0.05), postoperatively, in the CTR group (417 ± 77 μg/L and 257 ± 31 μg/L vs 246 ± 25 μg/L and 164 ± 12 ng/L, respectively, in the CS group). We conclude that the heparin coated CPB circuit with the uncoated cardiotomy reservoir may be less biocompatible than the identical CPB set used together with the CS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1997.tb00122.x
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  • 3
    Electronic Resource
    Electronic Resource
    Bestandsdichte und Vergesellschaftung brütender Wasservögel Südschwedens in Beziehung zur Produktivität der Seen (1985)
    Springer
    Journal of ornithology 126 (1985), S. 85-92 
    Details
    ISSN: 1439-0361
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary In 1975, breeding populations of waterfowl (i. e. divers, grebes, ducks, geese, swans, coot and moorhen) were censused in 79 eutrophic and 17 oligotrophic lakes of varying size within the county of Stockholm, south Sweden, in addition to 310 km2 of Lake Mälaren, the third largest lake in Sweden. This report analyses the composition and density of the waterfowl communities of these lakes in relation to the size and configuration of the lakes and in relation to some factors indicative of the productivity. Total waterfowl density, the density of breeding Great Crested Grebes, ducks and coot were all found to be positively and significantly correlated with various factors indicative of lake productivity. Similar correlations were also found between the number of breeding waterfowl species and diversity and the same environmental factors. Significant multiple correlations were found between the density of breeding Great Crested Grebes and the water factors as well as for number of breeding waterfowl species and diversity.
    Notes: Zusammenfassung 1975 wurden die Brutbestände von Wasservögeln (Seetaucher, Lappentaucher, Enten, Gänse, Schwäne, Blässhuhn) in 79 eutrophen und 17 oligotrophen Seen verschiedener Größe im Bezirk Stockholm, Südschweden, gezählt. Bestandsdichten für den gesamten Wasservogelbestand, für Enten, Haubentaucher und Blässhuhn waren mit verschiedenen Wasserfaktoren signifikant und positiv korreliert. Ähnliche Korrelationen wurden zwischen Artenzahl, Diversität und verschiedenen Wasserfaktoren gefunden. Signifikante multiple Korrelationen wurden zwischen Bestandsdichte des Haubentauchers, Artenzahl, Diversität und verschiedenen Wasserfaktoren gefunden. Entscheidende Bedeutung kommt dem Eutrophierungsgrad der stehenden Gewässer zu.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01640445
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  • 4
    Electronic Resource
    Electronic Resource
    Comparison of the properties of the two phases of lithium sodium sulphate (1986)
    Springer
    Journal of materials science 5 (1986), S. 645-646 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01731537
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Autumn waterfowl abundance in Lake Ringsjön, 1968–1996 (1999)
    Springer
    Hydrobiologia 404 (1999), S. 41-51 
    Details
    ISSN: 1573-5117
    Keywords: Lake Ringsjön ; restoration ; biomanipulation ; waterfowl ; bird
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lake Ringsjön has been subject to a severe eutrophication process followed by various counter measures, such as nutrient reduction and fish manipulation. We have quantified staging waterfowl populations from 1968, before the eutrophication process reached its maximum, to 1996 when both the nutrient and fish reduction programmes were performed. The general pattern is that high numbers staged in Lake Ringsjön in 1968–1972. In the following 15 years, few waterfowl used the lake as staging area, but from about 1989, the number of birds again began to increase. The likely explanation of this pattern is an improved food availability within the lake, rather than large-scale, national, increases in bird population sizes, a notion strengthened by comparisons with standardized national waterfowl counts. We conclude that there are strong relations between limnological conditions and waterfowl abundances, and that the measures undertaken in Lake Ringsjön improved the lake as a staging area for waterfowl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003709620993
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  • 6
    Electronic Resource
    Electronic Resource
    Autumn waterfowl abundance in Lake Ringsjön, 1968–1996 (1999)
    Springer
    Hydrobiologia 404 (1999), S. 41-51 
    Details
    ISSN: 1573-5117
    Keywords: Lake Ringsjön ; restoration ; biomanipulation ; waterfowl ; bird
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lake Ringsjön has been subject to a severe eutrophication process followed by various counter measures, such as nutrient reduction and fish manipulation. We have quantified staging waterfowl populations from 1968, before the eutrophication process reached its maximum, to 1996 when both the nutrient and fish reduction programmes were performed. The general pattern is that high numbers staged in Lake Ringsjön in 1968–1972. In the following 15 years, few waterfowl used the lake as staging area, but from about 1989, the number of birds again began to increase. The likely explanation of this pattern is an improved food availability within the lake, rather than large-scale, national, increases in bird population sizes, a notion strengthened by comparisons with standardized national waterfowl counts. We conclude that there are strong relations between limnological conditions and waterfowl abundances, and that the measures undertaken in Lake Ringsjön improved the lake as a staging area for waterfowl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003709620993
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    Paper (German National Licenses)
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