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Supraventricular tachycardia (SVT, PSVT) is one type of heart rhythm disorder in which the heart beats faster than normal. Symptoms may include dizziness, shortness of breath, anxiety, and palpitations. Treatment may include vagal maneuvers, medications, and surgery.
Atrial or Supraventricular Tachycardia (SVT) Atrial or Supraventricular tachycardia (SVT) is a fast heart rate that starts in the upper chambers of the heart. Some forms are called paroxysmal atrial tachycardia (PAT) or paroxysmal supraventricular tachycardia (PSVT). How it happens. Electrical signals in the heart's upper chambers fire abnormally, which interferes with electrical signals coming from the sinoatrial (SA) node --- the heart's natural pacemaker.