If a patient with coronary artery disease has a tachycardia, he or she must go to the hospital to complete the relevant tests, and the treatment is as follows: 1. An 18-lead electrocardiogram is performed, and enzymatic markers of the myocardium are required to determine whether the tachycardia is caused by the presence of an acute coronary syndrome. If this is the case, the acute coronary syndrome must be treated, depending on the situation, for example, vascular interventions can be chosen to relieve the tachycardia. 2, if the coronary heart disease sinus tachycardia is a transient situation, such as excessive mental tension or fatigue, fatigue and other conditions, and the resulting sympathetic overexcitation caused by tachycardia. At this time, you can take appropriate, such as beta-blockers, can relieve the above symptoms. 3, if the coronary heart disease tachycardia is due to the emergence of certain cases of arrhythmia, such as atrial fibrillation and so on. In this case, you can also apply drugs for atrial fibrillation, such as amiodarone, etc. In short, if a patient with coronary heart disease has a tachycardia, he or she must go to the hospital to have an electrocardiogram and choose the most correct treatment method.