Supraventricular tachycardia includes paroxysmal supraventricular tachycardia, atrial tachycardia, atrial flutter, and atrial fibrillation. Supraventricular tachycardia can present with symptoms such as palpitations (rapid heartbeat, often accompanied by panic), dizziness, anxiety, chest tightness, etc. It may cause heart failure, cardiac arrest and other hazards. 1. Symptoms: patients may have palpitations, which are characterized by irregular heartbeat or rapid heartbeat; dizziness, which is characterized by the feeling that objects and things around the patient rotate rapidly and the patient is unable to maintain balance; anxiety, which is characterized by inexplicable nervousness in the heart, inability to concentrate, excessive fear, etc.; chest tightness, which is characterized by the inability to use the strength to breathe, and the feeling of a stone pressing down on the chest. 2. Harm: Supraventricular tachycardia may induce serious complications such as heart failure, cardiogenic shock, cardiac arrest, etc. if treatment measures are not taken in time. It is recommended to go to the hospital for timely treatment of the above symptoms.