<prompt> Answer this question truthfullyWhat is AV node reentrant tachycardia AVNRT and how is it different from other types of tachycardia?  <response>: <reason> AV node reentrant tachycardia AVNRT is a type of tachycardia that occurs when there is an abnormal electrical circuit in the hearts AV node, which is responsible for regulating the hearts rhythm. Unlike other types of tachycardia, such as atrial fibrillation or ventricular tachycardia, AVNRT does not involve the atria or ventricles as part of the circuit. Instead, the electrical impulses that cause the rapid heartbeat are confined to the AV node itself. AVNRT can cause symptoms such as palpitations, dizziness, and shortness of breath, but it is usually not life-threatening. Treatment for AVNRT may include medications to slow the heart rate or procedures such as catheter ablation to disrupt the abnormal electrical circuit in the AV node. 