Question

impedance cardiography (ICG) is a noninvasive technology measuring total electrical conductivity of the thorax and its charges in time to process continuously a number of cardio dynamic parameters such as stroke volume , SV, heart rate , HR, cardiac output, CO, ventricular ejection time , VET, pre-ejection period and used to detect the impedance changes caused by a high frequency, low magnitude current flowing through the thorax between additional two pairs of electrodes located outside of the measured segment. The sensing electrodes also detect the ECG signal, which used as a timing clock of system . Suppose that the current (mA) through a pair of electrodes is described by function

i(t) = (60 − t)^2+ (60 − t) sin (√t)

and the resistance is a function of the current,

R= 10i + 2i^2/3

compute the average voltage over t=0 to 60 using multiple segment simpson's 1/3 rule

Answer #1

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