Myocardial ischemia is a serious disease. It refers to the decrease of blood perfusion in the heart, which leads to hypoxia and cardiac insufficiency, which may lead to cardiac arrest and cardiogenic shock at any time. You can bring Yi Anning at ordinary times. 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.