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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 623 (1991), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    350 Main Street , Malden , MA 02148-5018 , USA and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Futura Publishing, Inc.
    Pacing and clinical electrophysiology 27 (2004), S. 0 
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This report describes the implantation of a transcutaneous ICD system using a small patch electrode in the subscapular position, and an active-can device in a 5.3-kg infant. The indication for ICD implantation was recurrent cardiac arrest in the presence of normal coronary anatomy. Metabolic evaluation suggested a defect in fatty acid oxidation. (PACE 2004; 27:112–116)
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 20 (1997), S. 0 
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Between fanuary 1990 and October 1992, we implanted 16 steroid-eluting ventricular epicardial pacing leads (Medtronic 10295A and 10295B/4965) in 12 patients. There were 8 males and 4 females ranging in age from 3 months to 49 years (mean 8.7 ± 13.2, median 6.0years). Structural cardiac disease was present in 11 of 12 patients. Follow-up ranged from 3–73 months postimplant (mean 35.7 ± 22.3, median 28.5 months). Lead fracture (10295A) occurred in 1 of 12 patients. Of the remaining 11 patients, 8 of 11 have very low long-term pacing thresholds. Unexpectedly, 3 patients demonstrated precipitous threshold increases from 3 months to 3.5 years postimplant. Although no deaths resulted in these exit block patients, 1 of 3 exit block patients developed marked worsening of congestive heart failure. We reviewed and analyzed the data obtained at 4 weeks postimplant for all of the 10295A and 4965 patients in the entire Medtronic clinical study database. Using the criterion of a 4 week postimplant pacing threshold ≥ 0.12 ms (5 V), we found that the long-term risk of eventual exit block was 27.3% for the 10295A lead (P = 0.005) and 7.5% for the 10295B/4965 lead (P = 0.03). We, therefore, recommend that in patients implanted with the 4965 steroideluting epicardial lead, ventricular pacing thresholds ≥ 0.12 ms (5 V) measured at 4 weeks postimplant should prompt frequent threshold testing to detect late and potentially sudden ventricular pacing threshold increases.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 233 (1983), S. 453-462 
    ISSN: 1432-0878
    Keywords: Cell culture ; Lipoprotein ; Hypoxia ; Vascular cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Freshly dispersed aortic smooth muscle cells of the rat were grown in either 5% or 20% oxygen. Cells proliferated more rapidly in 5% than in 20% oxygen although at confluency the protein content per cell was 20% less in the 5% than in the 20% oxygen environment. By electron microscopy, cell morphology was the same in both environments. Uptake of low-density and high-density homologous lipoprotein was unaffected by oxygen tension. Other studies, however, showed that induction of receptors for lipoprotein binding behaved variably in the low compared to the high oxygen condition. These differences were not associated with differences in lipid synthesis in the two conditions.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0878
    Keywords: Vascular smooth muscle ; Tissue culture ; Hypoxia ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Primary cultures of vascular smooth muscle cells, isolated from rat aorta, were grown under normoxic (20% O2) and mildly hypoxic (5 % O2) conditions. Cells from both conditions were compared for growth characteristics, morphology, protein synthesis, lysosomal enzyme activity, and oxygen consumption. In no case was a consistently significant difference observed. These observations indicate that these cells can adapt or are adapted to mildly hypoxic conditions. Moreover, these results may indicate that the culture of vascular smooth muscle cells in mild hypoxia represents a closer approximation of in vivo growth conditions for these cells.
    Type of Medium: Electronic Resource
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