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  • 75.30  (1)
  • Color M-mode Doppler echocardiography  (1)
  • Disc space narrowing  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Ribbon-form Sendust alloy made by rapid quenching methods (1980)
    Springer
    Applied physics 21 (1980), S. 335-338 
    Details
    ISSN: 1432-0630
    Keywords: 75.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Ribbon-form Sendust was prepared by a roll quenching method. The size of the ribbon was 20∼110 μm thick, 2∼8 mm wide and 5∼10 m long. The normal direction of the ribbon plane was parallel to the [100] as well as the [110] axes, and no preferential directions exist within the ribbon plane. Vickers hardnessH v of the as-prepared ribbon was 563±7, decreased with increasing the annealing time and became almost constant. The minimum bending diameter of the as-prepared ribbon was 8 mm and increased gradually with increase of the annealing time. Initial permeability of the 84.80 Fe·9.50 Si·5.70 Al ribbon was about 34,000 in the frequency range from 1 to 3kHz and decreased to be 10,000 at 85 kHz. The permeability of the molded core in a resin was about 21,000 in the frequency range from 1 to 3 kHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00895924
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Radiographic evaluation of the lumbosacral disc height (1999)
    Springer
    Skeletal radiology 28 (1999), S. 638-643 
    Details
    ISSN: 1432-2161
    Keywords: Key words Lumbar spine ; Disc space narrowing ; Radiographs ; Disc degeneration ; Instability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To establish criteria for the radiographic evaluation of narrowing of the L5–S1 disc height, which varies widely with transition of the L5 vertebra. Design and patients. Nondegenerated disc heights of L3–4 to L5–S1 and the thickness and length of the L5 transverse process were measured on plain radiographs of the lumbar spine in 166 outpatients, aged 18–35 years (mean 26.3 years), in whom at least the L3–4 and L5–S1 discs both showed normal signal intensity on magnetic resonance imaging. The level of the iliac crest was recorded semiquantitatively. The disc height was expressed as a percentage of the L3–4 disc height, namely ”relative disc height”. The ratio of disc height to the sagittal diameter of the overlying vertebral body was termed the ”disc height index”. Results and conclusion. The relative disc height and disc height index of L5–S1 showed strong negative correlations with two anatomic variables, which were the relative thickness of the transverse process and the level of the iliac crest (P〈0.0001). The results of linear regression analysis suggest that narrowing of the L5–S1 disc height can be evaluated on plain radiographs alone in relation to these anatomic variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050566
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A novel color M-mode Doppler echocardiographic index for left ventricular relaxation: depth of the maximal velocity point of left ventricular inflow in early diastole (2000)
    Springer
    Heart and vessels 15 (2000), S. 205-213 
    Details
    ISSN: 1615-2573
    Keywords: Key words Diastolic function ; Prognosis ; Myocardial infarction ; Color M-mode Doppler echocardiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Color M-mode Doppler echocardiography (CMD) has been utilized in assessing left ventricular (LV) filling dynamics. We tested a novel CMD index, the depth of the spatiotemporal maximum of early diastolic inflow (D-maxV) in the left ventricle, to clarify its significance in assessing LV diastolic function. In 26 normal subjects and 32 patients with ischemic heart disease, D-maxV was determined with CMD as the distance from the mitral valve opening point to the center of the aliasing area in early diastole. Transmitral flow velocity was measured with pulsed Doppler. During routine catheterization, high-fidelity LV pressure measurements yielded diastolic variables in patients. D-maxV was significantly lower in the patients than the normals (13.0 ± 7.0 vs 23.4 ± 6.8 mm, P 〈 0.0001). D-maxV exhibited significant linear correlations with the minimal first derivative of LV pressure (r = 0.72, P 〈 0.01), the time constant of isovolumic relaxation (r = −0.67, P 〈 0.01), and LV minimal pressure (r = −0.53, P 〈 0.02) in the patients with wide ranges of peak early to late inflow velocity ratio (0.43–3.9) and deceleration time of early filling (79–293 ms). D-maxV showed an inverse correlation with LV end-diastolic pressure (r = −0.53, P 〈 0.02) and no significant correlation with mean pulmonary capillary wedge pressure. Moreover, Kaplan-Meier analysis focusing on the patients with myocardial infarction revealed that the group with D-maxV 〈 10.4 mm (n = 13) exhibited a lower cumulative cardiac event-free rate than that with D-maxV ≥ 10.4 mm (n = 14) (49.4% vs 92.9% at 5 years, P 〈 0.05). The depth of the spatiotemporal maximum of early diastolic LV inflow velocity reflects LV relaxation and is free of pseudonormalization. Evaluation of the LV relaxation separately from preload may have a prognostic value for myocardial infarction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003800070009
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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