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  • 1
    Electronic Resource
    Electronic Resource
    Zero- and first-sound damping in NaF observed by inelastic neutron scattering
    Amsterdam : Elsevier
    Physics Letters A 56 (1976), S. 139-141 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(76)90174-2
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  • 2
    Electronic Resource
    Electronic Resource
    Photon dispersion in CsBr
    Amsterdam : Elsevier
    Physics Letters A 32 (1970), S. 437 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(70)90042-3
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  • 3
    Electronic Resource
    Electronic Resource
    Importance of Atrial Contraction in Hypertrophic Obstructive Cardiomyopathy: Implications for Pacing Therapy (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of interventional cardiology 9 (1996), S. 0 
    Details
    ISSN: 1540-8183
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Hypertrophic cardiomyopathy is a primary myocardial disease characterized anatomically by left ventricular (LV) asymmetric hypertrophy and pathophysiologically by normal or even supernormal systolic ejection performance contrasting with impaired diastolic function. Altered ventricular relaxation tends to reduce the contribution of rapid ventricular filling to total LV filling volumes. Consequently, the contribution of left atrial (LA) contraction can be significantly increased. In some patients LV filling, and thus stroke volume, critically depend upon atrial systole. These data may have important clinical implications especially in patients treated with permanent cardiac pacing. Preserving a fully efficient LA contribution to LV filling is probably a key point in those patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8183.1996.tb00639.x
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  • 4
    Electronic Resource
    Electronic Resource
    Permanent Left Ventricular Pacing With Transvenous Leads Inserted Into The Coronary Veins (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 21 (1998), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This paper describes a preliminary experiment - conducted jointly by 2 centers - of permanent left ventricular pacing using leads inserted by the transvenous route and through the coronary sinus into the cardiac veins of the left ventricle free wall. The aim was to obtain permanent biventricular pacing in a totally endocavitary configuration in pattents with severe LV dysfunction and drug-refractory heart failure. Two types of leads were used: nonspecific unipolar leads at the beginning of the experiment, followed by leads specifically designed to be used in the coronary sinus in a second step. The electrode could be fitted in an adequate location in 35 of the 47 patients (75.4%), with a 1.15±0.7 V acute pactng threshold and 11.8±5.7 mV R wave amplitude. The success rate was significantly higher with the specific electrodes (81.8% vs 53,3%, p 〈 0.001). The pacing and sensing thresholds upon implantation were not influenced by the type of lead or by the localization of the cardiac vein that was catheterized (great cardiac vein, lateral vein, postero-lateral or posterior vein, mid cardiac vein). In contrast, the pacing threshold was significantly lower (0.8 ± 0.2 vs L8 ± 0.8 V; p = 0.002) and the R wave amplitude tended to be greater (13.1 ± 4.5 mV vs 9.3 ± 6.5 mV; p = 0.07) when the tip electrode could be inserted distally into the vein, by comparison with a proximal site near the ostium. At the end of follow-up (10.2 ± 8.7 months), 34 out of the 35 leads were still fully functional, with a chronic pacing threshold of 1.8 ± 0.7 V and a R wave amplitude of 10.7 ± 6 mV. To conclude, permanent LV pacing via the transvenous route is possible in most patients, with excellent safety and long-term results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.1998.tb01096.x
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  • 5
    Electronic Resource
    Electronic Resource
    Cardiac Resynchronization Therapy is an Important Advance in the Management of Congestive Heart Failure (2003)
    350 Main Street , Malden , MA 02148-5018 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Journal of cardiovascular electrophysiology 14 (2003), S. 0 
    Details
    ISSN: 1540-8167
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cardiac resynchronization therapy (CRT) is an emerging therapy that improves symptoms and exercise tolerance in patients with advanced heart failure, left ventricular systolic dysfunction, and intraventricular conduction delay. By correcting the AV, interventricular, and intraventricular dyssynchrony induced by conduction disorders, controlled studies have shown that CRT improved functional status, decreased heart failure hospitalization rate, and might have a positive effect on left ventricular remodeling. Recent and preliminary data from the COMPANION trial suggest that CRT alone or in association with defibrillator capacity significantly reduced total mortality and hospitalization and that total mortality was significantly reduced only in the CRT plus implantable cardioverter defibrillator (ICD) group. Many questions remain unanswered, particularly the selection of responder patients. (J Cardiovasc Electrophysiol, Vol. 14, pp. S27-S29, September 2003, Suppl.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1540-8167.14.s9.9.x
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  • 6
    Electronic Resource
    Electronic Resource
    Ein kapazitives Meßverfahren zur Bestimmung von Lage und Struktur der Phasengrenze bei einer flüssig-flüssig Zweiphasenströmung in einem Ringspalt (1982)
    Springer
    Heat and mass transfer 16 (1982), S. 45-51 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Im Rahmen von Strömungs- und Wärmeübergangsuntersuchungen an flüssig-flüssig Zweiphasenströmungen im Ringspalt ist die Kenntnis der Lage und der Struktur der Phasengrenze von entscheidender Bedeutung. Aus diesem Grunde wurde ein Meßverfahren entwickelt und erprobt, welches darauf beruht, daß die Kapazität eines elektrischen Kondensators von der Beschaffenheit des Dielektrikums abhängt.
    Notes: Abstract For studying the flowpattern and the heat transfer in liquidliquid two-phase flows in annuli the position and structure of the interface are of desive importance. For this reason an experimental method has been developed. It is based on the fact, that the capacitance of an electric condenser depends on the nature of the dielectricum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01322805
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  • 7
    Electronic Resource
    Electronic Resource
    Elastic constants in RbI, determined by inelastic neutron scattering (1978)
    Springer
    The European physical journal 30 (1978), S. 235-241 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Long-wavelength acoustic phonons have been studied in the whole (100)-plane of RbI at 295 K by means of inelastic neutron scattering. The raw data have been corrected for resolution effects taking into account the curvature of the dispersion surface and variations of the mode eigenvectors. The shifts of the neutron groups due to these resolution effects are discussed in detail. The analysis of the experimental results gives for the zero sound elastic constantsc 11=28.15±0.5,c 12=3.7±0.5 andc 44=2.85±0.1 1010 dyn/cm2. A comparison with first sound elastic constants taken from ultrasonic measurements yields significant differences between the high and low frequency elastic constantsc 11 andc″=(c 11−c 12)/2. The differences calculated from recent theories are in agreement with the experimental results for the elastic constantsc 11,c 44 andc″, but not forc 12. The dispersion surface in the (100)-plane is also shown for some out-of-symmetry data and compared with ultrasonic data as well as with theoretical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320028
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  • 8
    Electronic Resource
    Electronic Resource
    Coupled rotational and translational modes in the mixed molecular crystal KBr1−x (CN) x (1980)
    Springer
    The European physical journal 38 (1980), S. 253-262 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract TheE g andT 2g acoustic phonon modes of the molecular crystals KBr0.96(CN)0.04 and KBr0.86(CN)0.14 have been investigated by inelastic neutron scattering at 6, 90 and 300 K. Clear resonances due to mode-mode coupling to molecular excitations were observed. In complementary ultrasonic experiments the elastic constants were found to pass through minima as a function of temperature. The results were quantitavely explained by a model which assumes simple forms of the molecular excitation spectrum. An alternative interpretation, though being only qualitative, postulates a freezing of the CN molecules into a glass-like phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01315664
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