Method and System For Estimating Cardiac Ejection Volume And Placing Pacemaker Electrodes Using Speckle Tracking
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United States of America Patent
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Issued Date -
Jul 19, 2007
app pub date -
Dec 14, 2006
filing date -
Jul 22, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system for estimating the volume of blood ejected from a cardiac ventricle or atrium uses ultrasound to track speckle patterns in the heart. The process utilizes the M-mode to estimate volume differences in a view of the ventricle or atrium over time using speckle pattern motion to estimate volume differences between systole and diastole. Alternatively, the ultrasound speckle tracking method may be used in combination with Doppler processing techniques or to obtain temporal flow profiles across flow cross-sectional areas, from which the flow volume is computed. The method can also measure the phase delay of motion of sites on the cardiac wall relative to each other or relative to an ECG signal.
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