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  • 1
    ISSN: 1432-1440
    Keywords: Coronary occlusion ; epicardial mapping ; infarction size ; fibrinolysis ; Streptokinase ; fibrinogen degradation products ; Coronarocclusion ; epicardiales EKG ; Infarktgröße ; Fibrinolyse ; Streptokinase ; Fibrinogen-Spaltprodukte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 17 narkotisierten Hunden wurden mehrere Seitenäste des Ramus descendens der linken Kranzarterie unterbunden. Die ST-Segmentelevation im epikardial abgeleiteten EKG stieg dabei bis auf 22 mV nach 5 min und 19 mV nach 20 min an. Aortendruck, enddiastolischer Druck im linken Ventrikel, Herzfrequenz und die hämostasiologischen Parameter (Plasmathrombinzeit, Thrombinkoagulasezeit, Reptilasezeit, Plasmafibrinogen, Staphylokokken-Clumping-Test) änderten sich nicht. 20 min nach Beginn der Okklusion wurden die Gefäße geöffnet. Nachdem sich die St-Segmenthebung zurückgebildet hatte, wurde eine kontrollierte Fibrinolyse (Streptokinase 1,5 Mega I.E. in 30 min initial, Fortführung mit 0,75 Mega I.E./h) eingeleitet. Wenn die hämostasiologischen Parameter eine effektive Lyse anzeigten, wurden die gleichen Gefäße erneut unterbunden. Auch jetzt änderten sich die hämodynamischen Größen nicht wesentlich. Die ST-Segment-Elevation war jedoch signifikant um 50% geringer als nach einfacher Ligatur. Eine Kontrollgruppe, die nur das Lösungsmittel der Streptokinase erhielt, zeigte dagegen einen unveränderten Anstieg der ST-Streckenelevation. Die Wirkung der Streptokinase wird auf das Auftreten von Fibrinogen-Spaltprodukten und die Senkung des Fibrinogenspiegels zurückgeführt, die eine Verbesserung der Mikrozirkulation hervorrufen.
    Notes: Summary In 17 unaesthetized dogs several side branches of the left descending coronary artery were ligated. The ST-segment elevation in the epicardial ECG ascended to 22 mV after 5 min and to 19 mV after 20 min. Aortic pressure, left ventricular enddiastolic pressure, heart rate and hemostasiological parameters (thrombin-time, thrombin-coagulase-time, reptilase-time, plasma-fibrinogen, staphylococcal clumping test) did not change significantly. 20 min after the beginning of coronary occlusion, the vessels were reopened. When ST-segment elevation had disappeared, a controlled fibrinolytic therapy (Streptokinase 1.5 Mega I.E. in 30 min, later on 0.75 Mega I.E./h) was induced. When an effective fibrinolysis could be demonstrated by the hemostasiological parameters, the same vessels were occluded again. Now the hemodynamic parameters too did not change significantly, but the ST-segment elevation was significantly diminished for more than 50% compared with simple ligation. A control group, which only got the solvent of the streptokinase, showed the same ST-segment elevation. This effect, induced by streptokinase is ascribed to fibrinogen degradation products and a diminution in the amount of fibrinogen which cause an improvement of microcirculation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 103 (1975), S. 51-55 
    ISSN: 1432-072X
    Keywords: Yeast ; Invertase ; Isoenzymes ; Localization ; Vacuoles ; Spheroplasts ; Lipid Granules ; Cytosol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Homogenates from yeast cells contain 1% or less of sedimentable invertase activity. Sedimentability is equally low in homogenates from cells repressed or derepressed with regard to invertase secretion. Intracellularly, the mannanprotein form of invertase is largely localized in vacuoles whereas the small isoenzyme is largely present in the soluble cell fraction. These findings indicate that vesicles are not involved in the secretion of invertase. A soluble mode of invertase secretion is discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Sociology 1 (1975), S. 223-246 
    ISSN: 0360-0572
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Sociology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1435-2451
    Keywords: Endocarditis ; Valvular complications ; Endokarditis ; Herzklappenprothesen ; Komplikationen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 225 Patienten wurden wegen aktiver bakterieller Endokarditis oder der Klappenkomplikationen operiert. Die Frühmortalität betrug 12%. Bei 16 Patienten kam es zur Prothesendehiszenz - davon überlebten 6 Patienten die notfall mäßige Reoperation und 7 Patienten verstarben -, eine Indikation zu ausgedehnter Resektion des erkrankten Gewebes. Das mittlere Operationsalter betrug 43 Jahre. Auf Grund der vorliegenden Daten darf angenommen werden, daß die Mortalität durch eine kombinierte klappenchirurgische- und Coronararterien-Operation - falls indiziert-weiter gesenkt werden kann.
    Notes: Summary Between 1959 and 1973, 225 patients were operated on because of active bacterial endocarditis or its valvular complications. The hospital mortality was 12 percent and 60 patients died an average of 2 years after the operation. Seven early deaths occurred among 16 cases of acute dehiscence of the prosthetic valve-an indication for extensive resection of all diseased tissues. The average age was 43 years and there were 21 deaths due to myocardial infarction. The authors believe that the operative mortality can be further reduced through combined valvular and coronary artery surgery where this is indicated.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1435-2451
    Keywords: Aortocoronary bypass surgery ; Aorto-coronare Bypass-Chirurgie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von den bis Juli 1974 am Texas Heart Institute durchgeführten 3780 aorto-coronaren Bypass-Operationen waren 95 Patienten 70 Jahre oder älter. Die anfänglich hohe Operationsmortalität in dieser Altersgruppe mit 27% stand in klarem Gegensatz zur Gesamtmortalität von 7,1% und konnte im letzten Jahr - hauptsächlich auf Grund von Verbesserungen in der Operationstechnik - von 27 % auf 4,8 % reduziert werden. Damit kann auch beim alten Patienten, im Einzelfall, eine coronare Bypass-Operation als Behandlungsmöglichkeit ins Auge gefaßt werden.
    Notes: Summary From October 1969 through June 1974, 95 patients over 70 years of age underwent aortocoronary bypass at the Texas Heart Institute. The primary indication for surgery was severe angina, which was present in 88 patients. The mean coronary artery score was 9.51. Improvements in surgical technique are responsible for a reduction in the hospital mortality from 22.1 percent in all 95 patients to only 4.8 percent in the 21 patients operated upon during the first 6 months of 1974.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1435-2451
    Keywords: Fallot's Tetralogy ; Early correction ; Fallot lung ; Fallotsche Tetralogie ; frühzeitige Korrektur ; „Fallot-Lunge”
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Pathologische Anatomie, Pathophysiologie, Klinik, Prognose, Indikation zur operativen Behandlung, operativ technisches Vorgehen, Primär- und Spätergebnisse werden schematisch sowie an Hand von Operationsphotos, Angiogrammen und Schaubildern dargestellt. Die Ausstellung basiert auf den Erfahrungen von 172 Korrekturen und 64 palliativen Eingriffen an der Abteilung für Herz- und Gefäßchirurgie der Universität Kiel.
    Notes: Summary Pathologic anatomy, pathophysiology, clinical signs, prognosis, indications for operative treatment, operative technique, and primary and late results are demonstrated schematically by means of diagrams, intraoperative pictures and angiograms. The exhibition is based on experience gained in 172 corrective and 64 palliative operations performed in the department of cardiovascular surgery at Kiel University between 1969 and 1975.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 7 (1975), S. 127-130 
    ISSN: 1432-0630
    Keywords: Superconductivity ; Non-equilibrium transport properties ; Current induced transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The current-induced step structure in the phase transition from the superconducting to the normal conducting state of whiskers of tin shows hysteretic behaviour. By shunting the whisker by a small normal conductor a stable reentrant part of theV(I)-characteristic (negative differential resistance) could be measured for the first step both by de and ac instruments. If the condition of stabilization is not fullfilled, the voltage in the hysteretic region shows oscillations. These oscillations were measured and calculated with a simple model.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Basic research in cardiology 70 (1975), S. 198-208 
    ISSN: 1435-1803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of 0.1 mg/kg Verapamil on the extent of the ischemic area following ligation of a branch of the left descending coronary artery was studied in anaesthetized open chest dogs. The sum of the ST-segment elevation during the entire period of occlusion in the epicardial ECG was 15 mV in control infarction compared to 9 mV (p〈0.0005) when Verapamil was infused after ligation. Mean flow in the left descending coronary artery was reduced by coronary ligation alone on the average by 23%, but augmented by Verapamil for 5% above pre-occlusion control flow. Corresponding to the rise in the coronary flow and the drop in perfusion pressure under the influence of Verapamil, the increase of left coronary artery resistance induced by coronary occlusion was diminished. The positive effect of Verapamil on the size of myocardial infarction as estimated from the epicardial ST-segment changes is probably not induced by coronary vasodilatation, but by the Ca-antagonizing effect of this drug, as described by other authors.
    Type of Medium: Electronic Resource
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