Optimal stroke volume in left-ventricular ejection
نویسندگان
چکیده
منابع مشابه
Radionuclide angiocardiographic measurement of left ventricular volume and ejection fraction.
In recent years a number of different radionuclidic techniques have been developed to measure left ventricular volume and ejection fraction. Area-measurement concepts have been applied to static and electrocardiographically gated radionuclidic images which have resulted in accurate measurement of left ventricular end-diastolic volume (LVEDV) and ejection fraction (LVEF). Gated (end-diastolic an...
متن کاملquantification of aortic regurgitation severity by left ventricular to right ventricular stroke volume ratio
background: echocardiography is the most common test used for the evaluation of aortic regurgitation (ar). however, the role of echocardiography as an available and inexpensive method in the quantification of ar by the left ventricle to right ventricle stroke volume ratio (lv/rv sv ratio) has not been completely investigated. methods: between june 2005 and december 2007, 132 consecutive patient...
متن کاملOptimal control aspects of left ventricular ejection dynamics.
A model of the ejecting left ventricle is developed in which ventricular elastance as a function of time is optimized with respect to a simple performance index selected on an energetic basis. The model correctly predicts a number of well known experimental findings concerning the effects of preload and afterload conditions and varying system parameters on left ventricular pressure and elastanc...
متن کاملChanges in left ventricular stroke volume measured by Doppler echocardiography.
Cardiac stroke volume was measured simultaneously by Doppler echocardiography and thermodilution in 20 patients with coronary artery disease. Stroke volume as determined by ultrasound was calculated from the area of the aortic orifice and the flow velocity just distal to the aortic cusps. The recordings were made twice at rest. Ten patients were given dobutamine (2.5 and 5.0 micrograms/kg/min) ...
متن کاملDynamics of Left Ventricular Ejection
This paper was presented in part to the 50th Annuial Scientific Sessions, Americani Heart Association, Miami, Fla., Noveml)er 1977. The opinions or assertions expressed herein are the private views of the authors and are not to be construed as reflecting the views of the Department of the Army of the Department of Defense. Received for publicatiotn 6 April 1979 anid inl revised formt 7 July 198...
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ژورنال
عنوان ژورنال: IEEE Transactions on Biomedical Engineering
سال: 1989
ISSN: 0018-9294,1558-2531
DOI: 10.1109/10.16464