Anatomy
·Thorax & Spine
Cardiac Conducting System
⭐ PREMIUM
The conducting system sets the heartbeat; its blood supply links arrhythmia to coronary disease.
THE PATHWAY
• SA node (pacemaker, in the right atrial wall at the SVC/crista terminalis) → AV node (interatrial septum, near the coronary sinus) → AV bundle (of His) → right + left bundle branches (down the interventricular septum) → Purkinje fibres.
• The AV node delays conduction (allows atrial sy…
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