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When there is a double path in the atrioventricular nodal, that is, the fast path and the slow path, it is the electrophysiological mechanism of atrioventricular nodal reentrant tachycardia.

Close-up photo of industrial or office building fragment. Load-bearing structure. Junction or nodal point of metal framework. Abstract modern architecture or construction industry background.

Microscopic image of touch prep cytology smear of a lymph node in a patient with Hodgkin's Disease (lymphoma), showing Reed Sternberg cells (bi-nucleated cells with prominent nucleoli).

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d atomic orbital nodes (angular nodes or nodal planes)

Paroxysmal atrioventricular nodal reentrant tachycardia is usually a narrow QRS complex tachycardia with rapid and regular ventricular rate.

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