Title :
An ellipsoidal shell subtraction model of the right ventricle: validation and application in vivo
Author :
Feneley, Michael P. ; Elbeery, Joseph R. ; Rankin, J. Scott
Author_Institution :
St. Vincent´´s Hospital, Sydney, NSW, Australia
Abstract :
Right ventricular free-wall regional segment lengths and segment area were found to correlate linearly with cavity volume in isolated canine hearts, but were dependent also on left ventricular volume. In contrast, an ellipsoidal shell subtraction model of the right ventricle provided accurate estimates of cavity volume independent of left ventricular volume. The same model permitted continuous recordings of dynamic right ventricular volume fluctuations in vivo, accurately estimated right ventricular stroke volume, and permitted the first determinations in conscious dogs of the right ventricular end-systolic pressure-volume and stroke-work-end-diastolic-volume relationships proved to be linear, providing convenient models of right ventricular systolic performance
Keywords :
biomechanics; cardiology; physiological models; cavity volume; conscious dogs; ellipsoidal shell subtraction model; free-wall regional segment length; isolated canine hearts; left ventricular volume; right ventricle; segment area; stroke volume; volume fluctuations; Dogs; Equations; Fluctuations; Heart; In vivo; Linear regression; Position measurement; Pulse measurements; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95607
