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  • 1
    Electronic Resource
    Electronic Resource
    Isolated Anomalous Origin of Right Coronary Artery from the Main Pulmonary Artery (2005)
    350 Main Street , Malden , MA 02148-5020 , USA and 9600 Garsington Road , Oxford OX4 2XG , England . : Blackwell Science Inc
    Journal of cardiac surgery 20 (2005), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  The anomalous origin of the right coronary artery (ARCA) from the main pulmonary artery (MPA) is a rare congenital cardiac malformation and usually associated with other cardiac anomalies. Most patients with isolated ARCA from MPA remain asymptomatic, but they may develop myocardial ischemia and even sudden death. We reported an asymptomatic 7-year-old boy referred for evaluation of a heart murmur. Isolation of ARCA from MPA was diagnosed by echocardiography and then confirmed by cardiac catheterization and angiography. The right coronary artery was re-implanted into the ascending aorta. A preoperative thallium-201 myocardial perfusion showed a myocardial ischemia pattern in the anterolateral septal area after a dipyridamole stress test; the ischemia was completely resolved after surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.2005.200486.x
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of Blocked Atrial Beats on the Atrioventricular Nodal Recovery Property (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiovascular electrophysiology 9 (1998), S. 0 
    Details
    ISSN: 1540-8167
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: AVN Recovery Property After Blocked Atrial Beats. Introduction: Blocked atrial beats (AB) usually have concealed AV nodal penetration, which can change the nodal conduction time (AH) of a subsequent beat. However, without an output marker it is difficult to assess their effect on the node. In this report we used all possible parameters as nodal resting time after AB and plotted them against the AH of testing beats to study their effects on the node.Methods and Results: Atrial extrastimulation studies were done in 21 patients in whom one blocked atrial heat (A2B) was observed. Nodal recovery curves were obtained for basic pacing (A1), after a conducted premature heat (A2), and after A2B. In six patients there were 2 to 3 consecutively blocked beats (AnB) and recovery curves were constructed after each AnB. Nodal recovery curves were plotted with AH of the testing beat against different nodal resting parameters and fitted to a single exponential equation. We found contradicting phenomena when using different formats. (1) For recovery curves of A2B, there was a rightward shift from that of the basic curve when using H1A3 or A1A3 as the gauge (depression phenomenon). On the contrary, there was a leftward shift of the curves when using A2BA3 (facilitating phenomenon). (2) For recovery curves after multiple blocked beats there was a marked rightward shift of all curves except A(n-1)BAn -curves, which were all leftward shifted.Conclusion: Because these contradicting phenomena were dictated by the presenting formats, the terms “depression” and “facilitation” cannot he considered intrinsic AV nodal properties outside of the strict context of the pacing protocol and the format of data presentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8167.1998.tb01840.x
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  • 3
    Electronic Resource
    Electronic Resource
    Tetralogy of Fallot with an Additional Muscular Inlet Type Ventricular Septal Defect—Repair with Split Patch Technique (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 10 (1995), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An 8-year-old girl with tetralogy of Fallot (TF) and double ventricular septal defects (VSDs) was reported. The additional VSD was a muscular inlet type. A split patch technique was used to cover both VSDs during the total correction. Follow-up echocardiogram demonstrated no residual shunt nor significant tricuspid valve regurgitation. The patient is doing well 2 years after operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1995.tb00638.x
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  • 4
    Electronic Resource
    Electronic Resource
    Structural and Electronic Factors in Heterolytic Cleavage: Formation of the Co(I) Intermediate in the Corrinoid/Iron-Sulfur Protein from Clostridium thermoaceticum (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 5269-5273 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00015a042
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  • 5
    Electronic Resource
    Electronic Resource
    BUILDING A DATA-MINING GRID FOR MULTIPLE HUMAN BRAIN DATA ANALYSIS (2005)
    Boston, USA and Oxford, UK : Blackwell Publishing, Inc.
    Computational intelligence 21 (2005), S. 0 
    Details
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: E-science is about global collaboration in key areas of science such as cognitive science and brain science, and the next generation of infrastructure such as the Wisdom Web and Knowledge Grids. As a case study, we investigate human multiperception mechanism by cooperatively using various psychological experiments, physiological measurements, and data mining techniques for developing artificial systems which match human ability in specific aspects. In particular, we observe fMRI (functional magnetic resonance imaging) and EEG (electroencephalogram) brain activations from the viewpoint of peculiarity oriented mining and propose a way of peculiarity oriented mining for knowledge discovery in multiple human brain data. Based on such experience and needs, we concentrate on the architectural aspect of a brain-informatics portal from the perspective of the Wisdom Web and Knowledge Grids. We describe how to build a data-mining grid on the Wisdom Web for multiaspect human brain data analysis. The proposed methodology attempts to change the perspective of cognitive scientists from a single type of experimental data analysis toward a holistic view at a long-term, global field of vision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0824-7935.2005.00270.x
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  • 6
    Electronic Resource
    Electronic Resource
    The Effects of Aging on AV Nodal Recovery Properties (2001)
    Oxford, UK : Blackwell Futura Publishing, Inc.
    Pacing and clinical electrophysiology 24 (2001), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: KUO, C.-T., et al.: The Effects of Aging on AV Nodal Recovery Properties. The purpose of this study was to assess the changes of AV nodal recovery properties with aging. Although in children and young adults it was found that there were age dependent changes in their AV nodal recovery properties, in the older population this information was not available. In 92 subjects (aged 16–92 years) without AV nodal disease or dual AV nodal pathway physiology, their AV nodal recovery curves were studied by delivering premature atrial extrastimuli coupled to basic atrial beats during cardiac electrophysiological study. Data were analyzed using linear regression and curve-fitting techniques. Patients were grouped by age, group I 〈 40 years (n = 33), group II 40–59 years (n = 26), and group III 〉 60 years (n = 33). The results showed that the AV nodal recovery curve did not change significantly in the aging process except that the AV nodal effective refractory period had a positive correlation with increasing age. The latter was significantly increased in group III when compared to group I or group II. For this parameter, when patients whose AV nodal refractory period was limited by the atrial refractory period were excluded, there was still a statistically significant increase in group III compared to group II (P 〈 0.05): group I (n = 27): 202 ± 42 ms; group II (n =17): 197 ± 26 ms; and group III (n = 17): 224 ± 46 ms. The results suggest that the AV nodal recovery curve remains unchanged once it reaches adulthood, with the exception that the nodal effective refractory period becomes slightly longer after age 60.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2001.00194.x
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of a Blocked Atrial Beat on the Atrioventricular Nodal Recovery Property in Patients with Dual Nodal Pathways (2003)
    350 Main Street , Malden , MA 02148-5018 , U.S.A . : Blackwell Publishing
    Pacing and clinical electrophysiology 26 (2003), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Dual AVN physiology can be demonstrated by a variety of maneuvers. To determine whether AVN recovery times following a blocked extrastimulus facilitate or obscure detection of dual AVN physiology, 11 patients (9–17 years) were studied with dual AVN pathways by using single and double atrial extrastimuli. With a single atrial extrastimuli, the premature atrial stimulus (A2) was coupled to basic atrial beats (A1). The fast and slow AVN recovery curves were constructed with plots of the nodal conduction time against the recovery time (A1A2,A2H2). With double atrial extrastimuli, a fixed blocked A2 beat (A2B) was followed by a scanning atrial beat (A3). The nodal recovery property post-A2B was studied by plots of A2BA3,A3H3. In all patients the recovery curve of the fast pathway post-A2B had a leftward shift when compared to that of the pre-A2B curve (i.e., the AH was shortened at the same recovery time). The window of slow pathway conduction post-A2B disappeared totally in five patients and decreased significatly in six patients (post-A2B: 26 ± 42 ms; pre-A2B: 80 ± 65 ms, P 〈 0.05). In the six patients that still had slow pathway conduction post-A2B, the slow pathway effective refractory period post-A2B was significantly less than that of pre-A2B (215 ± 38 vs 268 ± 16 ms, P 〈 0.05). The fast pathway effective refractory period post-A2B was also diminished significantly (235 ± 62 vs 357 ± 76 ms, P 〈 0.0001). The authors conclude that blocked atrial beats decrease the visibility of the slow pathway conduction. (PACE 2003; 26:2091–2095)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.00325.x
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  • 8
    Electronic Resource
    Electronic Resource
    Initial Low Temperature Setting in Radiofrequency Catheter Ablation of Wolff-Parkinson-White Syndrome (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 23 (2000), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Previous studies have shown that with low temperature testing for RF ablation of arrhythmias, unnecessary irreversible myocardial lesions may be avoided. In children admitted/or RF ablation from June 1996 to May 1999, we evaluated the method of an initial temperature setting of 50°C for a maximum of 10 seconds. If accessory pathway block occurred, the temperature setting was immediately increased to 70°C and continued for 45–120 seconds (group 1). If accessory pathway block did not occur after several attempts, subsequent attempts were made with initial settings at 70°C–80°C at the same or different sites (group 2). Eighty patients with Wolff-Parkinson-White syndrome (mean age 11 ± 4 years) were treated using this method. Twelve patients were excluded for various reasons. Of the remaining 68 patients, 52 (76%) had successful block of the pathway at 50°C; 16 patients demonstrated block only at the higher temperature setting of 70°C–80°C. There were no statistically significant differences between these two groups in terms of age, weight, and location of accessory pathways. Unsuccessful 50°C test ablation attempts were 1.6 ± 2.4 in group 1 and 3.1 ± 2.9 in group 2 (P = 0.04). Total unsuccessful attempts were 1.6 ± 2.4 in group 1 and 8.1 ± 7.1 in group 2 (P = 0.001). The time from application of RF energy to the time of AP block in group 1 was not significantly different from group 2. In the majority of children, successful RF ablation can be achieved by using a temperature setting of 50°C, then 70°C. This will prevent unnecessary permanent injury at unsuccessful attempt sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.2000.tb00782.x
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  • 9
    Electronic Resource
    Electronic Resource
    Redetermination of racemic tartaric acid monohydrate (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o428-o429 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of the title compound, 2,3-dihydroxysuccinic acid monohydrate, C4H6O6·H2O, (I), was first determined (to R = 0.22) and reported by Parry [Acta Cryst. (1951), 4, 131–138]. We present here a redetermination with significantly improved accuracy. In the centrosymmetric crystals (space group P\overline 1, Z = 2), the enantiomeric molecules with both D- and L-configurations co-exist. An extensive intermolecular hydrogen-bond system involves hydrogen bonds formed by carboxyl and hydroxyl groups of the tartaric acid molecule, as well as the crystalline water molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801006158
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  • 10
    Electronic Resource
    Electronic Resource
    Dichloro(2,2′-diamino-4,4′-bi-1,3-thiazole-N3,N3′)copper(II) (2001)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 354-355 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title complex, [CuCl2(C6H6N4S2)], has a flattened tetrahedral coordination. The CuII atom is located on a twofold rotation axis and is coordinated by two N atoms from a chelating 2,2′-diamino-4,4′-bi-1,3-thiazole ligand and by two Cl atoms. Intramolecular hydrogen bonding exists between the amino groups of the 2,2′-diamino-4,4′-bi-1,3-thiazole ligand and the Cl atoms. The intermolecular separation of 3.425 (1) Å between parallel bithiazole rings suggests there is a π–π interaction between them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100020163
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