1109 Quantification of the orifice area of bioprostheses in aortic position by cardiovascular magnetic resonance
نویسندگان
چکیده
منابع مشابه
Cardiovascular magnetic resonance evaluation of aortic stenosis severity using single plane measurement of effective orifice area
BACKGROUND Transthoracic echocardiography (TTE) is the standard method for the evaluation of the severity of aortic stenosis (AS). Valve effective orifice area (EOA) measured by the continuity equation is one of the most frequently used stenotic indices. However, TTE measurement of aortic valve EOA is not feasible or not reliable in a significant proportion of patients. Cardiovascular magnetic ...
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this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
In vitro assessment of heart valve bioprostheses by cardiovascular magnetic resonance: four-dimensional mapping of flow patterns and orifice area planimetry.
OBJECTIVE The hemodynamics in proximity to stented aortic bioprostheses still differ from that under physiological conditions. This may prevent desired cardiac remodeling and promote aortic diseases. Further improvements in prosthetic technology require an accurate survey of the flow conditions on the prosthetic level and in the ascending aorta. Cardiovascular magnetic resonance (CMR) may have ...
متن کاملStented bioprostheses in aortic position
INTRODUCTION Biological stented prostheses are currently the main type of prosthetic valve used for aortic valve replacement. The ratio of bioprotheses to mechanical prostheses has switched in the last 15 years; the percentage of biological prostheses implanted has risen from 30 % to 85 %. Moreover the total number of implanted stented bioprostheses remained stable over the last years despite ...
متن کاملComparison between cardiovascular magnetic resonance and transthoracic doppler echocardiography for the estimation of effective orifice area in aortic stenosis
BACKGROUND The effective orifice area (EOA) estimated by transthoracic Doppler echocardiography (TTE) via the continuity equation is commonly used to determine the severity of aortic stenosis (AS). However, there are often discrepancies between TTE-derived EOA and invasive indices of stenosis, thus raising uncertainty about actual definite severity. Cardiovascular magnetic resonance (CMR) has e...
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ژورنال
عنوان ژورنال: Journal of Cardiovascular Magnetic Resonance
سال: 2008
ISSN: 1532-429X
DOI: 10.1186/1532-429x-10-s1-a234