ECG Basics…the scribbles explained

  • Each ECG lead is an electrical ‘snapshot’ of the heart taken from a specific position.
  • The limb leads view electrical activity in the heart in the vertical/coronal plane.
  • The precordial leads view electrical activity in the heart in the transverse/horizontal plane.
  • Understanding the anatomical area of the heart that each lead ‘looks’ at, allows mapping of pathology on the ECG.

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