Long-term haemodynamic evaluation of aortic pericardial xenograft.
نویسندگان
چکیده
منابع مشابه
Long-term haemodynamic evaluation of aortic pericardial xenograft.
Haemodynamic studies were performed in 30 patients at a mean interval of 43.4 (range 27 to 59) months after aortic valve replacements with pericardial xenografts. Five valve sizes--19, 21, 23, 25, and 27 mm annulus diameter--were used. Of these 30 patients, 16 had preoperative haemodynamic investigations. Comparison of the pre- and postoperative data showed a marginal but significant increase i...
متن کاملMultiple valve replacement with pericardial xenograft. Clinical and haemodynamic study.
Multiple valve replacement with pericardial xenografts (sizes 17 to 31) was undertaken in 76 patients. The incidence of early and late deaths was 10.5 and 3.9 per cent, respectively. ACtuarially it is predicted that 94.7 +/- 3.9 per cent of hospital survivors will be alive at three and a half years after valve replacement. Though long-term anticoagulants were not used, thrombotic valve obstruct...
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H aemodynamic abnormalities, caused by pericardial effusion, range from undetectable or mild, to life threatening, depending on the determinants discussed below. These include the rate at which the effusion accumulates and whether or not the pericardium is scarred and thus adds an element of constrictive pericarditis. Pericardial adhesions or organisation of the fluid can result in localised, a...
متن کاملComparable long-term results for porcine and pericardial prostheses after isolated aortic valve replacement
OBJECTIVES Outcome of aortic valve replacement may be influenced by the choice of bioprosthesis. Pericardial heart valves are described to have a favourable haemodynamic profile compared with porcine valves, although the clinical notability of this finding is still controversially debated. Herein, we compared the long-term results of two commonly implanted bioprosthesis at a single centre. ME...
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از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
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ژورنال
عنوان ژورنال: Heart
سال: 1978
ISSN: 1355-6037
DOI: 10.1136/hrt.40.6.602