Supraventricular tachycardia (SVT) is a condition in which the heart rate speeds up to more than 100 beats per minute. It is caused by abnormal electrical impulses within the heart's upper chambers. There are several synonyms for SVT, which include paroxysmal supraventricular tachycardia (PSVT), atrial tachycardia, and rapid atrial fibrillation. These terms are often used interchangeably and describe the same condition. Symptoms of SVT may include palpitations, dizziness, shortness of breath, and chest pain. Treatment options may include medication, procedures to reset the heart's rhythm, or surgical intervention. If left untreated, SVT can lead to more serious complications and should be evaluated by a healthcare professional.