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  • 1
    ISSN: 1432-1440
    Keywords: Cerebral blood flow ; Carotid stenosis ; Microspheres ; Ventricular tachycardia ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to investigate the effect of hypotensive tachycardias on cerebral blood flow (CBF) in the presence of significant carotid stenosis. The experiments were performed in 57 spontaneously breathing rats during arterial normoxia and normocapnia anesthetized with thiobarbital. CBF was determined with radio-labeled microspheres during control conditions (normofrequent sinus rhythm, normotension; group A; n = 15), during high-rate left ventricular pacing (660–840 ppm) at normotension (group B1; n = 13), borderline hypotension (group B2; n = 15) and severe hypotension (group B3; n = 7). In addition, CBF measurements were performed during borderline hypotension induced by hemorrhage (group C; n = 7). Global CBF was 1.09 ± 0.29 ml g−1 min−1 in group A, 0.93 ± 0.40 in group B1, 0.68 ± 0.31 in group B2 (P 〈 0.05 vs. A), 0.42 ± 0.16 in group B3 (P 〈 0.05 vs. A) and 0.83 ± 0.2 in group C. The highest CBF values were found in the cerebellum (A; 1.43 ± 0.5 ml g−1 min−) and the lowest in the postocclusive tissue of the ipsilateral hemisphere (A; 0.74 ± 0.2 ml g−1 min−1). In all groups a 15% mean CBF reduction in the right hemispherical cerebrum in comparison to the left hemisphere was observed (P 〈 0.01). In contrast, hemispherical CBF of the cerebellum did not differ. The CBF blood pressure relationship shifted to lower CBF values, the threshold of CBF regulation shifted to higher blood pressure values in the tissue regions distal to the occluded vessel during hypotensive tachycardias. One carotid artery occlusion and high rate ventricular pacing seem to be a reliable model for quantifying cerebral hemodynamics during arrhythmias in the presence of carotid stenoses. Using this experimental approach it was demonstrated that hypotensive tachycardias and obstructions within the ectracranial carotid vascular bed such as arterial vessel stenoses and occlusions have an additive effect on CBF reduction.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1285
    Keywords: Schlüsselwörter Endokarditis fibroplastica Löffler – thrombotisches Stadium – Echokardiographie – Kortikosteroide ; Key words Löffler's eosinophilic endocarditis – thrombotic stage – echocardiography – corticosteroides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary We report on a male, 31 year old, Turkish patient with an intracardiac mass in the right ventricle, reduction of performance and weight, as well as intermittent fever. No eosinophilia was documented in the peripheral blood; cardiac function was primarily normal. Besides the differential diagnosis of Löffler's endocarditis (endomyocardial fibrosis) an inflammatory disease and a malignant cardiac tumor were suggested. The diagnosis of Löffler's endocarditis could not be confirmed morphologically by echocardiography nor histologically by right ventricular biopsy. Operative removal of the mass lesion was neccessary because of fast tumor progression, fulminant pulmonary embolism, and infiltration of the tricuspid valve. Only then, histologically Löffler's eosinophilic endocarditis of thrombotic stage was diagnosed. Antiphlogistic therapy with cortisone was initially performed. With a dose reduction after 6 months, a relapse of the thrombotic mass occured. Therefore, continuous treatment with cortisone and azathioprine was induced followed by further tumor regression and further clinical stabilization since 8 months of treatment.
    Notes: Zusammenfassung Wir berichten über einen 31jährigen türkischen Patienten mit einer rechtskardialen Raumforderung, Leistungsminderung, Gewichtsabnahme und intermittierenden Fieberschüben. Im peripheren Blut bestand keine Eosinophilie, die kardiale Funktion war primär unauffällig. Neben einer Endokarditis fibroplastica Löffler bestand differentialdiagnostisch der Verdacht auf ein entzündliches Geschehen sowie einen malignen Herztumor. Bei echokardiographisch untypischer Morphologie der rechtsventrikulären Raumforderung konnte durch Myokardbiopsie die Diagnose nicht gesichert werden. Bei raschem Wachstum der Raumforderung, fulminanter Embolie und Infiltration in die Trikuspidalklappe konnte erst durch die operative Tumorexstirpation die histologisch-pathologische Diagnose einer Endokarditis fibroplastica Löffler im thrombotischen Stadium gestellt werden. Die Behandlung bestand in einer antiphlogistischen Therapie mit Kortikosteroiden. Im Auslaßversuch kam es nach 6 Monaten zu einem Tumorrezidiv. Eine Steroid-Dauermedikation in Kombination mit Azathioprin führte anschließend zu einer erneuten Tumorregression und Stabilisierung seit 8 Monaten nach Beginn der Medikation.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Kawasaki Syndrom ; Koronaraneurysma ; Mukokutanes Lymphknotensyndrom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Das Kawasaki-Syndrom ist eine akute fieberhafte Erkrankung des Kleinkindalters. Auch 30 Jahre nach der Erstbeschreibung durch Kawasaki [1] im Jahre 1967 wird es weiterhin vorwiegend durch das Vorliegen einer Kombination klinischer Symptome diagnostiziert. Seit Einführung der Immunglobulintherapie im akuten Stadium der Erkrankung kommt es beim überwiegenden Anteil der betroffenen Kinder zum folgenlosen Ausheilen. Die schwerste Komplikation ist ein Befall der Koronargefäße mit Entwicklung eines akuten Ischämiesyndroms oder längerfristig der Ausbildung von Koronaraneurysmata. Wir berichten über den Fall eines 28jährigen Hochleistungssportlers, der 17 Jahre nach dem scheinbar folgenlosen Ausheilen einer Kawasaki-Erkrankung einen akuten Hinterwandinfarkt bei massiv dilatierten Koronargefäßen erleidet.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Non-Hodgkin's lymphoma ; Adrenal neoplasm ; Adrenal hypofunction ; Meningeal neoplasm ; Lymphomatous leptomeningitis ; Antineoplastic agents ; Intrathecal application
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 64-year-old man with high malignant B-cell lymphoma in both adrenal glands was investigated. Adrenal insufficiency was his predominant symptom at presentation. Despite surgical resection of the malignancy and cytostatic chemotherapy leptomeningeal involvement occurred and the patient died nine month after the diagnosis. Nine so far reported cases with primary adrenal lymphoma were reviewed. One of these also developed lymphomatous leptomeningitis. Suggestions of a pathogenetic contribution of adrenal lymphoma to leptomeningeal involvement and arising therapeutic consequences in the treatment of primary adrenal lymphoma are discussed.
    Type of Medium: Electronic Resource
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