Electrodes

• Electrodes (sensor)


  Small sensors place on the skin to detect the electrical activities from the heart
• Leads (Views: I, II, III)


  Cover wires that conduct the electrical impulse of the electrodes from the heart to the ECG machines
• Chest leads 


  V1-V6, AKA pre-cortial leads, unipolar leads, standard limb leads
• Augmented leads (amplified leads)

  AVR, AVL, AVF (Augmented Ventricle right, left, foot)
• Lead I

  Right Arm (RA) to left arm (LA)
• Lead II


  Right arm (RA) to left leg (LL)
• Lead III

  Left arm (LA) to left leg (LL)
• Lead I, II, III


  The Einthoven triangle
• Unipolar 


  The ability to see electrical impulses in one direction
• Bipolar 


  The ability to see electrical impulses in two directions