منابع مشابه
Aortic Valve Sparing Operation
A standard approach in the surgical treatment of severe aortic regurgitation and/or aortic root dilatation is Bentall procedure, it means replacement of the aortic valve and ascending aorta with a composite graft including mechanical or biological valve. The original technique described by Bentall and De Bono in 1968 (5). This is a „safe“ method with low mortality, but patients have to accept t...
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We. describe how to achieve minimum transverse emittance in RF photoinjectors by applying theoretical predictions from a fully analytical model of beam dynamics in a split injector. This device consists of a short two cell (full+partial) RF gun followed by a drift and a booster RF linac. Matching the beam in the booster to the invariant envelope, an equilibrium mode of laminar beam flow, is sho...
متن کاملA precursor in waterhammer analysis – rediscovering
In 1883 Johannes von Kries published the theory of waterhammer in a study of blood flow in arteries. He derived the “Joukowsky formula” before Joukowsky (1898) and Frizell (1898) did. He considered skin friction in unsteady laminar flow and thus derived formulas for wave attenuation and line pack. The theory was confirmed by experimental results obtained in rubber hoses. In 1892 he published th...
متن کاملCabrol operation in prosthetic valve infective endocarditis
Methods A 50 years old women who had underwent aortic valve replacement (19#HPsjm) + mitral valve replacement (29#sjm) and tricuspid DeVega anuloplasty at our department, was admitted to our hospital with fever. Echocardiography confirmed vegetations on aortic and mitral valves, abscess formation in aortic root, grade IV SEK in left atrium with pulmonary artery pressure of 60-65 mmHg. With posi...
متن کاملIs tricuspid valve replacement a catastrophic operation?
OBJECTIVE Tricuspid valve replacement (TVR) has a high postoperative mortality, despite recent advances in perioperative care. We report the results of our experience in TVR with an emphasis on early mortality and morbidity and long-term follow-up. METHODS Between October 1994 and August 2007, 80 consecutive TVRs were performed in 78 patients. The mean age was 48+/-14 (range: 20-70) years. Th...
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ژورنال
عنوان ژورنال: Bulletin of JSME
سال: 1984
ISSN: 0021-3764,1881-1426
DOI: 10.1299/jsme1958.27.1188