Antiarrhythmic medication – Vaughan William’s classification

Some Block Potassium Channels

  • Sodium (class I) e.g.:
    • Ia – quinidine
    • Ib – lignocaine/lidocaine
    • Ic – flecanide
  • Beta-blockers (class II) e.g. propranolol
  • Potassium (class III) e.g. amiodarone
  • Calcium (class IV) e.g. verapamil, diltiazem
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