Supraventricular tachycardia itself does not usually lead to sudden death, but it can lead to death if there are comorbidities, and sustained episodes of supraventricular tachycardia are likely to lead to heart failure. Supraventricular tachycardia, or supraventricular tachycardia, can be triggered by disease factors such as myocarditis, mental and psychological factors such as fatigue, and bad habits such as smoking, and manifests itself as palpitations, chest tightness, and other clinical manifestations. Supraventricular tachycardia itself does not cause sudden death, but when combined with organic heart disease such as acute myocardial infarction and obstructive hypertrophic cardiomyopathy, it can easily lead to the emergence of heart failure and cardiogenic shock, which may lead to death in severe cases. Supraventricular tachycardia should be actively diagnosed and treated, and the general prognosis is good and clinical cure can be achieved after treatment.