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  • 1990-1994  (2)
  • 1993  (2)
  • Atrial fibrillation  (1)
  • Engineering General  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Diagnosis of cardiac thrombosis in patients with atrial fibrillation in the absence of macroscopically visible thrombi (1993)
    Springer
    Virchows Archiv 422 (1993), S. 67-71 
    Details
    ISSN: 1432-2307
    Keywords: Atrial fibrillation ; Cerebral embolism ; Rough endocardium ; Cardiac thrombosis ; Autopsy diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cardiac thrombosis due to atrial fibrillation (AF) has been recognized as the most common cause of cerebral embolism. However, sometimes no macroscopic thrombus is found at autopsy in the heart of a victim of this type of cerebral embolism. We investigated morphological changes in the left atrial endocardium of 31 patients (including 21 cases with AF) who had died of cerebral embolism. “Rough endocardium” (RE) seen macroscopically provided evidence for the existence of atrial thrombosis. The RE that appeared in AF cases was due to a granular and wrinkled appearance of the endocardium associated with oedematous and fibrous thickening. Fibrin-thread deposits were also always distinguishable. Mural thrombi and oedema with neutrophil infiltration in the subendocardium could be seen under the microscope. Small areas of endothelial denudation and thrombotic aggregations were commonly observed by scanning electron microscopy (SEM). These SEM lesions were significantly more frequent in cases with AF than in controls (P〈 0.001). The diagnostic success rate for atrial thrombosis among cases with AF increased from 33.3% to 81% when thrombi proven by histological investigation of the areas with RE were added. Left atrial RE may be an anatomically relevant finding for the existence of atrial thrombosis with AF, when the thrombosis cannot be detected upon gross observation at autopsy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01605135
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A new approach to magnetic field analysis by the dual reciprocity boundary element method (1993)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 36 (1993), S. 2073-2085 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This paper presents an application of the dual reciprocity boundary element method to non-linear magnetic field analysis. Advanced techniques employed in the procedure include discontinuous elements, quasi-singular and hyper-singular integration schemes and the Galerkin formulation. Numerical results are included to show the performance of the proposed approach.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620361208
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    Paper (German National Licenses)
    Fulltext
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