منابع مشابه
Cardiac bioprostheses in the 1990s.
T he first successful heart valve replacements were carried out in 1960 with the use of mechanical prostheses.1-3 Because of the risk of throm-boembolism that is inherent to all mechanical prosthe-ses and the hazards of continuous anticoagulation, fewer thrombogenic tissue valves were developed.4,5 In the early 1960s, homograft replacement of the aortic valve was reported,6'7 and shortly therea...
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The merits of mechanical aortic valve have been reiterated by the study of Weber et al. [4]. They selected a cohort of 103 patients younger than 60 years old with the Perimount Carpentier-Edwards pericardial tissue valve and compared them with a propensity matched group of 103 patients with mechanical bileaflet aortic valve over a period of 10 years. Surprisingly, valve-related event rates were...
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PURPOSE To estimate the doses to the heart and coronary arteries from common breast cancer radiotherapy (RT) regimens used worldwide from the 1950s to the 1990s. METHODS AND MATERIALS Virtual simulation and computed tomography planning were used to reconstruct the megavoltage and electron regimens. Manual planning was used for the orthovoltage and brachytherapy regimens. Several sources of va...
متن کاملIRM in the 1990s
from the Database Directions Technologies for IRM 49 Workshop Editors 1 Alfonso F. Cardenas Elizabeth N. Fong, Alan H. Goldfine IRM in a Decentralized/Distributed Introduction 1 Environment 66 Robert M. Curtice Olin Bray SPECIAL ISSUE FROM THE FOURTH DATABASE DIRECTIONS WORKSHOP: INFORMATION RESOURCE MANAGEMENT—MAKING IT WORK Chairperson, Technical Committee on Database Engineering Prot. Gio Wi...
متن کاملPharmacovigilance in the 1990s.
Since the thalidomide disaster brought the risks of drug events usually refer to general practitioner contacts, outpatient contacts, hospitalization or deaths. This approach therapy into sharp focus, efforts have been made to establish observational systems for early detection of possible adverse was first mooted by Finney in Edinburgh as far back as 1965 [10], but had to await the advent of po...
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ژورنال
عنوان ژورنال: Circulation
سال: 1993
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.88.2.775