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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Basic research in cardiology 94 (1999), S. 284-293 
    ISSN: 1435-1803
    Keywords: Key words Calcium (cellular) – contractile function – diastole – heart failure – sarcoplasmic reticulum (function)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: Load dependence of left ventricular (LV) contraction and relaxation was investigated at baseline and after alteration of intracellular calcium handling by caffeine. Methods: Afterload was increased by aortic clamp occlusions (n = 281) in anesthetized open-chest dogs (n = 7). Control and first heartbeat after the intervention were considered for analysis. Results: Caffeine (50 mg/kg, iv) had no inotropic effect. The systolic LV pressure (LVP), developed in response to aortic occlusion, decreased as ejection proceeded and this pressure generating capacity was not affected by caffeine. Late-systolic aortic occlusions induced premature onset and accelerated rate of initial LVP fall at baseline and similarly after caffeine. Graded diastolic aortic occlusions induced systolic LVP elevations of various magnitudes. Smaller LVP elevations prolonged ejection and accelerated LVP fall, while larger elevations had opposite effects. The transition from acceleration to deceleration was observed at 83.1 ± 1.1 % of peak isovolumetric LVP at baseline and at lower loads, at 77.6 ± 1.2 %, after caffeine (p 〈 0.01). Isovolumetric heartbeats prolonged the time constant τ by 238 ± 70 % at baseline and only by 155 ± 44 % after caffeine (p 〈 0.01). The relaxation-systolic pressure relation, which describes afterload dependence of relaxation, was also modified by caffeine. Conclusions: Caffeine affected LV relaxation without altering contractility. As a consequence contraction-relaxation coupling was modified by caffeine. These results might help to understand load dependence of relaxation in conditions where intracellular calcium handling is altered.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-9813
    Keywords: Key words Inflammatory myofibroblastic proliferation ; Inflammatory pseudotumor ; Stomach ; Children ; Helicobacter pylori
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Gastric inflammatory myofibroblastic proliferation (IMP) is an extremely rare entity in children, which to our knowledge has only been mentioned in case reports. We describe the ninth pediatric case and review the literature concerning the etiology, clinical and laboratory features, pathology, treatment, and outcome. There has been a predominance in preschool females. Abdominal pain, upper gastrointestinal hemorrhage, and an abdominal mass, either isolated or associated, have been the main clinical features. Iron-deficiency anemia has been a constant finding. Lesions are elevated and involve the full thickness of the gastric wall, usually with ulceration of the luminal surface; extragastric extension suggesting malignancy is frequent. Diagnosis is made by histology after surgical excision. There was no mortality directly related to gastric IMP, and only one case recurred after surgical excision. The pathogenesis is controversial, but the finding of Helicobacter pylori in our case may indicate an inflammatory origin. Awareness of this benign lesion and its mimicry of malignancy is important so that inappropriately aggressive therapy can be avoided.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 16 (2000), S. 107-108 
    ISSN: 1437-9813
    Keywords: Key words Gastric volvulus ; Morgagni hernia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Gastric volvulus (GV) is a rare surgical emergency in infancy and childhood. The first case of a child with an acute GV secondary to a Morgagni hernia (MH) is reported. The authors briefly discuss the etiology, clinical features, and management of acute GV and review the scattered reports of strangulated MHs in children.
    Type of Medium: Electronic Resource
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