Chest tightness in front of the eyes blackness, loss of consciousness, should be as soon as possible to improve the examination, according to the results of the examination, treatment. Chest tightness, blackness before the eyes and loss of consciousness, can be seen in low blood sugar. Hypoglycemic attacks are usually accompanied by panic and cold sweat, and can be treated with oral sugar water. Transient cerebral ischemic attack with darkness before the eyes, loss of consciousness is often accompanied by one side of the limbs without domination, slurred speech, etc., and the symptoms of limb disorder can be recovered within 24 hours. Give anti-platelet aspirin, lipid regulator atorvastatin treatment. Bradyarrhythmias, including sick sinus node syndrome, complete atrioventricular block, may present with black eyes and loss of consciousness. A complete dynamic electrocardiogram should be performed, and the diagnosis can be confirmed and treated with pacemaker implantation. Severe myocardial ischemia, myocardial infarction, may cause a drop in blood pressure, bradycardia, may also cause the above symptoms, need to check the electrocardiogram, myocardial enzymes, cardiac ultrasound, etc., to take aspirin, statin, nitrate drugs, blood pressure, heart rate to be lowered to elevate the pressure to elevate the heart rate of the treatment, if necessary, to carry out coronary artery stenting, thrombolysis or bypass grafting. Chest tightness eyes black loss of consciousness, must go to the hospital for examination, according to the doctor’s prescription program treatment.