Supraventricular tachycardia is short for supraventricular tachycardia, a condition that is damaging to the heart. Supraventricular tachycardia episodes are characterized by an accelerated heart rate of up to 150-250 beats per minute, cardiac overactivity, and increased myocardial oxygen consumption. And ventricular diastolic period is shortened, cardiac output is reduced, can make the coronary artery blood supply decline, further induced angina pectoris, and even the heart pump failure, serious cases can be progressed to ventricular fibrillation and sudden death on this basis. Therefore, supraventricular tachycardia can cause some damage to the heart, especially if it is combined with organic heart disease, the patient is also accompanied by chest tightness, fainting and other symptoms. If supraventricular tachycardia occurs, the patient should consult a doctor and under the guidance of the doctor, undergo timely restoration of the rhythm, if necessary, radiofrequency ablation.