3 Sin t x Cos t Sin t

傅立葉轉換 – 正交性質 3 Sin( t) x Cos( t) Sin( t) x Cos(2 t) Sin( t) x Cos(3 t)

Hilbert-Huang Transform (HHT)

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Final

ECG 的 morphology • Combining ECG Metrics：Arrhythmia (with beat-to-beat changes but no morphological changes) can’t be recognized due to Algorithm imperfection. • Evaluate MV in a prospective study on a large population of patients. • Look closely at role of MV in predicting sudden cardiac death. • Use MV to quantify the effect of treatments (e. g. , pharmacology, surgery etc. ) • Use codebook to encode ECG signal into series of meaningful codes

Dynamic Time Warping 1

Dynamic Time Warping 2

A patient with ventricular bigeminy A patient with ventricular trigeminy A rhythm of 4 units corresponding to an ectopic atrial rhythm

A patient with recurrent tachyarrhythmic episodes. These episodes appear in the raw tracing as dense regions, corresponding to an increased number of heart beats during these periods owing to faster heart rate Raw ECG tracing, symbolic signal and entropy taken over 30 second windows for a patient with atrial fibrillation. As in Figure 5, atrial fibrillation in the raw tracings corresponds to the dense regions

One-Point PWV 檢測技巧

Non. Invasive BP monitering 藍色：A-Line測得 ABP的收縮壓 紅色：理論估算之收縮壓 Less than ¼ of data can be correlated where the pressure changing is slow. The methodology should be combined with measured arterial mechanics.

• norepinephrine