What describes an array of heart rhythms with fast rates originating above the ventricles?

Supraventricular Tachycardia is characterized by a rapid heart rhythm that originates from above the ventricles, specifically from the atria or the atrioventricular (AV) node. In this condition, the heart beats at an unusually high rate, typically exceeding 100 beats per minute, due to abnormal electrical signaling in the upper chambers of the heart. This can cause symptoms such as palpitations, shortness of breath, and sometimes dizziness.

The term 'supraventricular' indicates that the arrhythmia arises from structures above the ventricles, which is significant in distinguishing it from other types of tachycardia, such as ventricular tachycardia, where the rapid rhythm originates from the ventricles themselves. Understanding the origin of the heart rhythms is crucial in diagnosing and monitoring patients, as treatments may vary based on whether the arrhythmia is supraventricular or ventricular in nature.