"This is often carried out as a '12 lead' ECG where 10 physical electrodes are used to produce 12 'leads'. In this circumstance, a lead represents the direction the potential difference is measured and is derived from the physical electrodes placed on the skin. 6 electrodes are placed across the chest (V1 to V6) and 1 electrode is placed on each limb (RA, LA, RL, LL)."
"This is often carried out as a '12 lead' ECG where 10 physical electrodes are used to produce 12 'leads'. In this circumstance, a lead represents the direction the potential difference is measured and is derived from the physical electrodes placed on the skin. 6 electrodes are placed across the chest (V1 to V6) and 1 electrode is placed on each limb (RA, LA, RL, LL)."
"These are used to produce three limb leads (termed I, II and III), three augmented limb leads (aVR, aVL and aVF) and six chest (praecordial) leads (V1 to V6). These leads are assessing the heart's electrical activity from a different direction and can be used to assess different anatomical regions of the heart (and also therefore different coronary artery territories). The leads are often grouped as follows:"
"These are used to produce three limb leads (termed I, II and III), three augmented limb leads (aVR, aVL and aVF) and six chest (praecordial) leads (V1 to V6). These leads are assessing the heart's electrical activity from a different direction and can be used to assess different anatomical regions of the heart (and also therefore different coronary artery territories). The leads are often grouped as follows:"
"These are used to produce three limb leads (termed I, II and III), three augmented limb leads (aVR, aVL and aVF) and six chest (praecordial) leads (V1 to V6). These leads are assessing the heart's electrical activity from a different direction and can be used to assess different anatomical regions of the heart (and also therefore different coronary artery territories). The leads are often grouped as follows:"
"inferior leads - II, III and aVF"
"Pathologies may affect one of those territories or multiple territories, for example, anteroseptal pathology may affect V1, V2, V3 and V4."
"There are numerous indications for carrying out an ECG, including:"
"known or suspected electrolyte abnormalities (e.g. hyperkalaemia)"