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Foreword by Professor V Schrire
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alternating alternating current amperes amplifier amplitude anode anode current applied atom battery beam blood capacitance capacitor cardiac output cardiopulmonary resuscitation Cathode Ray Oscilloscope cause cell charge chest coil collector common commonly conductor connected current flow curve cycles per second damping defibrillator deflection diode direct current discharge effect electrical electrocardiogram electrocardiograph machine electrolyte electron flow emitter energy external cardiac compression fibrillation galvanometer germanium grid heart implanted increase induced E.M.F. inductance input instrument joules junction linear lines of force magnetic field material maximum measurement membrane metal method mm.Hg n-p-n transistor natural frequency negative ohms operate oscillator oscilloscope oxygen p-n junction pacemaker patient permit plate positive potential pressure primary produce pulse ratio recording rectifier resistance resistor screen secondary sensitivity shown in Figure signal stylus tank circuit thermionic valve tion transducer transformer transistor triode tube ventilation ventricular voltage volts wave waveform whilst wire zero zinc