slow pathway

slow pathway

Cardiology An anomalous conduction pathway in the heart which has no known functions; the SP provides the antegrade limb of a reentry circuit in atrioventricular nodal reentrant tachycardia–AVNRT–the fast pathway provides the retrograde limb–the 'slow-fast' or common form of AVNRT; selective catheter ablation of the atrial end of the SP eliminates AVNRT with little risk of AV block