Supraventricular Tachycardia (SVT) is a condition characterized by an abnormally fast heart rate that originates above the heart's ventricles. This rapid heartbeat can occur suddenly and may last for a few seconds to several hours. Symptoms often include palpitations, dizziness, shortness of breath, and chest discomfort. SVT can be triggered by various factors, including stress, caffeine, or certain medications. While it is usually not life-threatening, it can cause significant discomfort and may require medical evaluation. Treatment options include lifestyle changes, medications, or procedures like catheter ablation to restore a normal heart rhythm.