In AV Nodal Re-entry Tachycardia a ‘short-circuit’ is formed between two normal conducting fibres in the heart, called the “fast pathway” (blue) and
the “slow pathway” (pink).

This simple re-entry circuit is one of the most common causes of supra ventricular tachycardia. This ‘short-circuit’ can be treated with a simple procedure called radio-frequency ablation.

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