Atrioventricular nodal reentrant tachycardia (AVNRT) is a common form of paroxysmal supraventricular tachycardia characterized by a reentrant circuit involving the atrioventricular node. It is clinically significant due to its potential to cause rapid heart rates, leading to symptoms such as palpitations, dizziness, or syncope. A key association is its occurrence in young, otherwise healthy individuals, and it can be effectively managed with vagal maneuvers or catheter ablation.