Preventing supraventricular tachycardia mainly involves adopting good lifestyle and dietary habits, as well as timely treatment of any underlying diseases or heart conditions. Paroxysmal supraventricular tachycardia is mostly due to refractory excitation. To prevent paroxysmal supraventricular tachycardia, one should develop good living and eating habits, pay attention to balanced diet, eat a light diet, avoid stimulating foods, avoid long-term consumption of coffee and strong tea, quit smoking and drinking, and control emotions. If you have some underlying diseases such as high blood pressure, dilated cardiomyopathy, heart failure, etc. that can lead to supraventricular tachycardia, you should consult a doctor in time, take active treatment, pay attention to rest, and avoid overexertion.