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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.
Rapid Heart Beat in Dogs. Supraventricular Tachycardia in Dogs. Supraventricular tachycardia (SVT) refers to an abnormally rapid heart rate originating above the heart's ventricles. This can occur during times of rest or low activity (i.e., at times other than exercise, illness, or stress).