Beat-to-beat estimation of windkessel model parameters in conscious rats
نویسندگان
چکیده
منابع مشابه
Beat-to-beat estimation of windkessel model parameters in conscious rats.
A windkessel model was applied on a beat-to-beat basis to evaluate the arterial mechanical characteristics in seven conscious rats. Ascending aortic arterial pressure (AP) and blood flow were recorded during steady-state in basal conditions, during infusions of isoprenaline, sodium nitroprusside, and phenylephrine, and after intravenous atenolol injection. For each cardiac cycle the exponential...
متن کاملBeat-to-beat stroke volume estimation from aortic pressure waveform in conscious rats: comparison of models.
Several methods for estimating stroke volume (SV) were tested in conscious, freely moving rats in which ascending aortic pressure and cardiac flow were simultaneously (beat-to-beat) recorded. We compared two pulse-contour models to two new statistical models including eight parameters extracted from the pressure waveform in a multiple linear regression. Global as well as individual statistical ...
متن کاملBeat Estimation on the Beat
This paper presents a novel method for the estimation of beat interval, and the exact location of the beats from audio files. As a first step, a feature extracted from the waveform is used to identify note onsets. The estimated note onsets are used as input to a beat induction algorithm, where the most probable beat intervals are found. The note onsets corresponding to the beat locations are th...
متن کاملBiophysical Model for Beat - to - Beat Variations of Vectorcardiogram
For a realistic biophysical model, a linear deformation of the myocardium lead to a linear transformation of the orthogonal electrocardiosignals under the condition of topological invariability of the depolarization and repolarization processes in the myocardium. Certain relationships have been found between the linear transformations in the physical and functional spaces. Several practically i...
متن کاملA review of beat-to-beat vectorcardiographic (VCG) parameters for analyzing repolarization variability in ECG signals.
Elevated ventricular repolarization lability is believed to be linked to the risk of ventricular tachycardia/ventricular fibrillation. However, ventricular repolarization is a complex electrical phenomenon, and abnormalities in ventricular repolarization are not completely understood. To evaluate repolarization lability, vectorcardiography (VCG) is an alternative approach where the electrocardi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Journal of Physiology-Heart and Circulatory Physiology
سال: 1998
ISSN: 0363-6135,1522-1539
DOI: 10.1152/ajpheart.1998.274.1.h171