منابع مشابه
The Limbic Ledge
SINCE its initial description,' transseptal left heart catheterization has been increasingly used as a diagnostic and a research technic. While refinements in instrumentation have emerged 2, 3 the method of septal puncture has remained unchanged. The original description of septal puncture required that the catheter and needle assembly be positioned in the right atrium at a point near the junct...
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The subject of the limbic system is old anatomically, but very new from the point of view of our knowledge of its function-indeed, so new that many of the more important disclosures have been made within the last two years. These recent advances have a direct bearing on many branches of clinical medicine and are of immediate importance both to the general physician and to the neurologist. The l...
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Failure to grasp the rationale behind cleaning and shaping concepts can increase the occurrence of needless complications, such as ledges. A ledge is created when the working length can no longer be negotiated and the original pathway of the canal has been lost. Extension of the access cavity to provide unobstructed access to the root canals, precurving and not forcing instruments, using NiTi f...
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Self-assembled nanowires offer the prospect of accurate and scalable device engineering at an atomistic scale for applications in electronics, photonics and biology. However, deterministic nanowire growth and the control of dopant profiles and heterostructures are limited by an incomplete understanding of the role of commonly used catalysts and specifically of their interface dynamics. Although...
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ژورنال
عنوان ژورنال: Circulation
سال: 1965
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.31.1.103