Conduction System (the wiring)

• Conduction System Diagram

  A) SA node

  B) Atrial pathways

  C) AV node

  D) AV bundle (HIS)

  E) R bundle branch

  F) moderator band

  G) L bundle branch

  H) interventricular septum

  I) Purkinje fibers

  
• Sinoatrial node (SA node)

  • Heart's pacemaker
  • initiates electrical impulses to stimulate contraction
  • Found in R atrium at the junction of coronary sinus
• Atrioventricular (AV) bundle (bundle of His) 


  Nerve bundle transfers electrical impulses to the ventricles
• Systole (Gr./La.)

  heart contraction
• Diastole (Gr./La.)

  heart relaxation
• Systolic blood pressure

  Pressure during heart contraction (highest pressue)