DocumentCode :
3027582
Title :
Iterative estimation for valvular regurgitant fraction measurements by radionuclide angiocardiography
Author :
Twieg, D. ; Nardizzi, L. ; Stokely, E. ; Willerson, J.
Author_Institution :
Southern Methodist University, Dallas, Texas
fYear :
1979
fDate :
10-12 Jan. 1979
Firstpage :
1309
Lastpage :
1312
Abstract :
Several models have been developed and iterative estimation techniques have been applied to radionuclide angiocardiographic data to measure valvular regurgitation fractions in animal experiments with controlled amounts of regurgitation. The animal model contains a known amount of regurgitation and comparison of the regurgitant fraction estimated from the mathematical models and that measured from the animal models are compared to validate the non-invasive tracer technique. Several new modifications in the two phase mathematical model of cardiac pump function are introduced and data is presented to validate the use of this technique in future patient studies. The techniqueis applicable to mitral and aortic regurgitation as well as combined valvular incompetence.
Keywords :
Angiocardiography; Animals; Cameras; Electric variables measurement; Fluid flow measurement; Frequency estimation; Frequency measurement; Heart valves; Mathematical model; Time measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Decision and Control including the 17th Symposium on Adaptive Processes, 1978 IEEE Conference on
Conference_Location :
San Diego, CA, USA
Type :
conf
DOI :
10.1109/CDC.1978.268131
Filename :
4046318
Link To Document :
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