Back pain and toothache may be symptoms of heart attack, especially for patients with coronary atherosclerotic heart disease. In acute myocardial infarction, the pain may be radiated to other parts of the body, in addition to the pain in the precordial region. When some patients have myocardial infarction in the posterior wall of the heart, they will show pain in the back, and in some patients, the pain of myocardial infarction will also be radiated to the teeth as toothache, and no abnormality is found after oral examination and examination of the skeletal muscles in the back. If there are significant abnormal changes in the electrocardiogram and significant elevation of cardiac enzymes such as troponin, it indicates the presence of acute myocardial infarction, especially in elderly patients and diabetic patients who are not sensitive to pain.