(Solved): The waveforms above are from a patient in sinus rhythm (normal ECG rhythm). ECG trace A is contami ...

The waveforms above are from a patient in sinus rhythm (normal ECG rhythm). ECG trace A is contaminated with noise, while ECG trace B is clean of any interference. The ECG has been obtained using a five electrode lead set with left arm (LA), right arm (RA), left leg (LL), right leg (RL) and chest (V) electrode positions. Trace \( \mathrm{A} \) is a Lead III trace and trace B a Lead II trace. a) Draw Einthoven's Triangle showing the electrode lead configurations which give Lead I, Lead II and Lead III. b) There are many factors that may be causing interference on trace A. List four (4) factors that may be causing the interference and discuss the factors with a conclusion as to which factor is most likely to be causing the interference.