<prompt> Answer this question truthfullyWhat are the typical mistakes in positioning the leads for an EKG?  <response>: <reason> An example of reverse lead placement Right and left arm lead reversal can be distinguished from the much rarer dextrocardia by looking at the precordial R wave progression. Right arm and left leg lead reversal. Lead II now measures the signal between the left and right leg, which is remote from the heart. 