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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Digitizing and signal averaging of left ventricular pressure signals using a dedicated radionuclide imaging system
European Journal of Nuclear Medicine, Volume 13, No. 7, Year 1987
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Description
A method for obtaining left ventricular (LV) volume curves, synchronized with average LV pressure (LVP) curves for calculation of LV contractility, is described. Multiple gated blood pool imaging was performed to calculate average LV volume curves. Simultaneously with this acquisition, LVPs and aortic pressures were measured by indwelling catheters and recorded on an FM tape recorder. These signals were fed to the computer as image information and averaged and processed by the software developed for this purpose. Pressure resolution of the calibrated images was 4 mmHg/pixel when provision was made for a maximum pressure of 200 mmHg. A good correlation (r=0.99) was obtained between the calculated peak LVPs and mean peak LVPs read from the chart recorder. The regression equation was: digitized peak LVP=1.04xchart recording-5.11 mmHg and the standard error of the estimate was 2.9 mmHg. Similar results were obtained with the aortic pressure (AP) measurements (digitized AP=0.94 x chart recording+6.37 mmHg, the standard error of the estimate was 3.8 mmHg). The digitized data also allowed the construction of pressure-volume loops for interpretation of ventricular contractility. © 1987 Springer-Verlag.
Authors & Co-Authors
Herbst, Charles Petrus
South Africa, Bloemfontein
University of the Free State
Dormer, Kenneth J.
United States, Oklahoma City
Oklahoma City Department of Veterans Affairs Medical Center
Brackett, Daniel J.
United States, Oklahoma City
Oklahoma City Department of Veterans Affairs Medical Center
Wilson, Michael F.
United States, Oklahoma City
Oklahoma City Department of Veterans Affairs Medical Center
Barkan, Brian
United States, Oklahoma City
Oklahoma City Department of Veterans Affairs Medical Center
Burow, Robert D.
United States, Oklahoma City
Oklahoma City Department of Veterans Affairs Medical Center
Statistics
Citations: 6
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1007/BF00252991
ISSN:
03406997
e-ISSN:
16197089