On an ECG monitor, leads II and III display poor quality waveforms. Which electrode and/or lead cable is suspected to be bad? Right leg Left leg Right arm Left arm If the R-wave of ECG waveform has to be converted into a rectangular pulse, what type of op-amp circuit can be used? voltage comparator voltage follower non-inverting amplifier inverting amplifier The process of depolarization results in the stimulation of the cardiac cells. True False Ventricular Systole refers to what part of the cardiac cycle? O Contraction of the lower chambers of the heart Relaxation of the lower chambers of the heart Location of pacemaker of the upper chambers Location of the pacemaker of the lower chambers