Sinus rhythm is a normal heart rate, myocardial ischemia that is coronary artery disease, first of all, you should go to a regular specialist hospital, for the appropriate formal examination, preferably through the coronary angiography to confirm the diagnosis, according to the coronary angiography and the symptoms of the development of the program, the treatment method is as follows: 1, if the stenosis of blood vessels is not serious, the symptom is not particularly obvious, and more stable, you can control the medication, such as aspirin to prevent thrombosis If the stenosis is not serious and the symptoms are not particularly obvious and stable, it can be controlled by medication, such as aspirin to prevent blood clots, statin to relieve plaque, beta blocker and nitrate to alleviate the symptoms; 2. If the stenosis is more serious than 80%, and the effect of medication is not good, it can be recanalized by revascularization surgery, and the recanalization includes interventional balloon, stenting and bypass. If the condition is more serious, and three branches of the lesion, you can use coronary artery bypass grafting.