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Medical & Biological Physics
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According to the Einthoven theory, the heart is considered as:
The dependence of metal resistance R on the temperature t is given by the formula
Choose the physiotherapy procedures based on the action of direct current
The amplitude characteristic of an amplifier is the dependence of
Speed of the ECG recording is equal to 25mm/s, length of the QRS complex is 2 mm, length of the ST interval is 6 mm. Determine the duration of ventricular action potential (in ms).
Pulses are symmetrical if
Thermocouple with the sensitivity of 15 μV/°С generates electromotive force of 0.45 mV. Determine the temperature of measurement junction of the thermocouple if the temperature of reference junction is equal to 10°С.
Specific heat produced in conductive tissue under the UHF-therapy is determined by the formula
The amplitude of the ECG calibration signal is equal to 10 mm when voltage of 1 mV is applied. The height of R wave is 8 mm. Determine the voltage amplitude of this wave (in mV).
Dynamic range of the amplifier falls into the range from Uin1 =0,1 mV to Uin2 =100 mV. Calculate the magnitude of the dynamic range in decibels.