ECG Lead positioning
The ECG is one of the most useful investigations in medicine. Electrodes attached to the chest and/or limbs record small voltage changes as potential difference, which is transposed into a visual tracing Basic landmarks 3-electrode system Uses 3 electrodes (RA, LA and LL) Monitor displays the bipolar leads (I, II and III) To get best results – Place electrodes on the chest wall equidistant from the heart (rather than the specific limbs) ...