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SYSTEMS AND METHODS FOR MODEL-BASED ESTIMATION OF CARDIAC EJECTION FRACTION, CARDIAC CONTRACTILITY, AND VENTRICULAR END-DIASTOLIC VOLUME
SYSTEMS AND METHODS FOR MODEL-BASED ESTIMATION OF CARDIAC EJECTION FRACTION, CARDIAC CONTRACTILITY, AND VENTRICULAR END-DIASTOLIC VOLUME
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机译:基于模型的心脏射血分数,心脏收缩率和心室舒张末期容积估计的系统和方法
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摘要
The methods and systems for estimating cardiac ejection fraction, cardiac contractility, and ventricular end-diastolic volume on a beat-by-beat basis include observing arterial blood pressure waveforms to determine ventricular compliances for a pressure-volume loop in the ventricle. Uncalibrated or calibrated cardiac ejection fraction may be calculated from estimates of stroke volume and the ventricular compliances. Cardiac contractility may be calculated from estimates of a ventricular compliance. Uncalibrated or calibrated ventricular end-diastolic volume may also be calculated from estimates of stroke volume and the ventricular compliances. A set of calibration parameters for calibrating cardiac ejection fraction or ventricular end-diastolic volume may be estimated in a least-squares manner.
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