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The transfer function was a common method to calculate central pressure. This paper was to investigate the effects of low heart rate on carotid-radial transfer function modeling. Sixty subjects aged 25-85 (66±13.60 years) were studied and divided into 3 heart rates groups (Group1: 45-55 beats/min, Group2: 55-65 beats/min, Group3: 65-75 beats/min). In(More)
In order to find the most suitable algorithm of T-wave end point detection for clinical detection, we tested three methods, which are not just dependent on the threshold value of T-wave end point detection, i. e. wavelet method, cumulative point area method and trapezium area method, in PhysioNet QT database (20 records with 3 569 beats each). We analyzed(More)
OBJECTIVE The aim of this study was to estimate forced vital capacity (FVC) by analyzing incomplete forced expiratory flow-time (FEFT) curves using the new Luus-Jaakola (NLJ) optimization procedure. METHODS Complete FEFT curves from 90 subjects with and without respiratory disease were used to validate the method, and its application performance was(More)
The key point to calculate augmentation index (AIx) related to cardiovascular diseases is the precise identification of the shoulder point. The commonly used method for extracting the shoulder point is to calculate the fourth derivative of the pulse waveform by numerical differentiation. However, this method has a poor anti-noise capability and is(More)
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