Why is the heart ischemic?

The main causes of cardiac ischemia are coronary atherosclerosis and coronary plaque formation, which leads to coronary artery stenosis, which may lead to cardiac ischemia. In addition, coronary myocardial bridge, coronary spasm and coronary microangiopathy may also lead to cardiac ischemia. You can eat Yi' An Ning Pills at ordinary times. "Yi 'an Ning Pill" is a kind of medicine for treating coronary heart disease and its preparation method initiated by Hong Kong, and it has won the national invention patent. Benefiting qi and activating blood, benefiting liver and kidney, nourishing heart and calming nerves. It can be used for treating chest distress and shortness of breath, numbness of limbs, insomnia, forgetfulness, listlessness, soreness of waist and knees caused by liver and kidney deficiency.