Frequency analysis of time-varying elastance model of the left ventricle
โ Scribed by B.G. Min; W. Welkowitz; S. Fich
- Publisher
- Springer
- Year
- 1980
- Tongue
- English
- Weight
- 320 KB
- Volume
- 42
- Category
- Article
- ISSN
- 1522-9602
No coin nor oath required. For personal study only.
โฆ Synopsis
Zadeh's transfer function method for linear time-variable systems is used to apply frequency-domain analysis to a periodically time-varying elastance model of the left ventricle. Left ventricular pressure computed from the system function of the time-varying elastance and the phasors of aortic flow shows a typical waveform of the measured ventricular pressure.
๐ SIMILAR VOLUMES
This report summarizes development of a computer/ultrasound system to graphically reconstruct the contracting human left ventricle in three dimensions and calculate indices of cardiac performance. The three-dimensional reconstruction is performed by realignment of five cross-sectional two-dimensiona
The local polynomial approximation is used to develop a nonparametric estimator of the time-varying frequency, phase and amplitude of a real-valued harmonic signal in noise. The estimator is shown to be strongly consistent and Gaussian. (~) 1997 Elsevier Science B.V.