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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 323-332 
    ISSN: 1432-1440
    Keywords: Pulmonary gas exchange during exercise ; Myocardial infarction ; Late period of recovery ; Pulmonaler Gaswechsel unter Belastung ; Myokardinfarkt ; Späte Rehabilitationsphase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der späten Rehabilitationsphase nach Myokardinfarkt (13–24 Monate p. infarctum) wurde der pulmonale Gaswechsel neben hämodynamischen Parametern bei 23 Patienten unter Belastung untersucht. Der Belastungsverlauf der gemessenen Parameter gleicht dem Herz- und Lungengesunder. Die arteriellen Blutgaspartialdrucke ( $$Pa_{O2} , Pa_{CO2} $$ ) bleiben gegenüber den Ruhewerten unverändert oder zeigen nur geringe statistisch nicht signifikante Änderungen. Die alveoläre Ventilation $$\dot V_A $$ zeigt im Belastungsverlauf bei allen Patienten keine Unterschiede. Herzzeitvolumen $$\dot Q$$ , Atemminutenvolumen $$\dot V_E $$ , die Toträume, alveolo-arterielle Partialdruckdifferenzen der Atemgase ( $$AaD_{O_2 } , aAD_{CO_2 } $$ ) und Ventilations-Perfusionsverhältnis der Gesamtlunge $$\dot V_A /\dot Q$$ lassen jedoch erkennen, daß entsprechend der unterschiedlichen Arbeitskapazität der Patienten diese Parameter einen differenten Belastungsgang zeigen. Da sich die unterschiedliche Arbeitskapazität nach dem Verhalten von Herzzeitvolumen $$\dot Q$$ und gemischtvenösen Blutgaspartialdrucken aus der verschiedenen kardialen Funktion der Patienten erklären läßt, erscheint die Pathologie des pulmonalen Gaswechsels von der jeweiligen linksventriculären Funktion des Patienten abhängig. 12 der 23 untersuchten Patienten, die nach hämodynamischen Kriterien eine Belastungsinsuffizienz des Herzens zeigten, wiesen die ausgeprägtesten Änderungen des pulmonalen Gaswechsels auf. Die unterschiedliche Arbeitskapazität der Patienten ist allein von der kardialen Funktion begrenzt. Eine Leistungslimitierung durch Störung der Lungenfunktion ließ sich nicht beweisen.
    Notes: Summary After myocardial infarction in the late period of recovery (13–25 months p. infarctum) pulmonary gas exchange in 23 patients was measured besides as hemodynamic parameters during exercise. The parameters take a course similar to that of subjects without lung and heart diseases. Arterial blood gas tensions ( $$Pa_{O_2 } ,Pa_{CO_2 } $$ ) remain unchanged compared to resting values. Alveolar ventilation did show no difference in any of the patients. Minute ventilation $$\dot V_E $$ , the various dead spaces, alveolar-arterial gas differences ( $$AaD_{O_2 } , aAD_{CO_2 } $$ ) and ventilation-perfusion ratios of the whole lung $$\dot V_A /\dot Q$$ suggest however that these parameters show different courses according to the physical capacity of the patients. As the physical capacity of each patient is due to different cardiac functions taken by cardiac output and mixed venous blood gas tensions alterations of pulmonary gas exchange seemed to be dependent on the respective left ventricular function of the heart. Of the twenty-three patients, twelve with cardiac failure under exercise showed the most pronounced alterations in pulmonary gas exchange. Therefore, the different physical work capacity of the patients are determined only by cardiac function. No limitation of the productivity due to impeded lung function could be proved.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Myocardial infarction ; Late recovery period ; Cardio-pulmonary data at rest and during exercise ; Myokardinfarkt ; Späte Rehabilitationsphase ; Kardio-pulmonale Funktionsparameter in Ruhe und unter Belastung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 22 Patienten, die 1–2 Jahre zuvor komplikationslos einen Myokardinfarkt durchgemacht hatten, wurden bis an die Grenze ihrer Leistungsfähigkeit stufenweise ergometrisch belastet. Entsprechend der Belastbarkeit wurden die Patienten in vier Leistungsgruppen eingeteilt und die Anpassung der wichtigsten kardio-pulmonalen Funktionsparameter in jeder Gruppe getrennt verfolgt. Dabei waren in der Hälfte der Fälle bereits in Ruhe diskrete Insuffizienzzeichen nachweisbar. Bei der folgenden Ergometerbelastung stellten sich auch bei den übrigen Patienten in der ersten Belastungsstufe Insuffizienzzeichen ein.
    Notes: Summary From 22 patients in the late period of recovery from myocardial infarction, cardio-pulmonary data were recorded at rest and during exercise. The physical work was increased stepwise until patients reached their individual limit of exercise. According to the different work capacity four groups of patients were formed with the aim to demonstrate the adaption processes of cardio-pulmonary parameters until reaching the peak of work capacity. In one half of the patients we still found signs of cardial insufficiency at rest. After only slight physical work signs of cardiac insufficiency appeared also in the other half of patients.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 301-306 
    ISSN: 1432-1440
    Keywords: Myocardial infarction ; Fibrinolysis ; Plasminogen activators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The early treatment of acute myocardial infarction has changed rapidly in recent years. Given the fact that an occlusive coronary thrombus can be found in most infarct patients within 4 h after clinical symptoms, the idea of instituting medical or mechanical recanalization of the occluded vessel is intriguing. However, invasive measures are time consuming, expensive and not freely available to a great number of patients. Thus, only i.v. fibrinolytic therapy of acute myocardial infarction will gain wider application in the near future. Several concepts have been worked out, one of which uses a high-dosage streptokinase or urokinase regimen. A different therapeutic alternative has been made possible by the development of selective fibrinolytic substances, such as the tissue-type plasminogen activator (t-PA) or the anisoylated plasminogen-streptokinase activator complex (APSAC). Preliminary clinical data have shown that the coronary artery patency rate achieved after i.v. administration of t-PA or APSAC is higher than that after conventional treatment with streptokinase or urokinase. The incidence of severe bleeding complications is low and comparable in these studies. However, until myocardial salvage has been demonstrated with early i.v. fibrinolytic therapy in acute myocardial infarction in a placebo-controlled randomized trial, this therapeutic concept will still be unsettled.
    Type of Medium: Electronic Resource
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