Complete heart block (CHB)

Features

• syncope
• heart failure
• regular bradycardia (30-50 bpm)
• wide pulse pressure
• JVP: cannon waves in neck
• variable intensity of S1

ECG showing third degree (complete) heart block

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Complete heart block following a MI? - right coronary artery lesion

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The atrioventricular node is supplied by the posterior interventricular artery, which in the majority of patients is a branch of the right coronary artery. In the remainder of patients the posterior interventricular artery is supplied by the left circumflex artery.