What is the most accurate test to do when the heart pain is not present, should be based on the suspected disease to carry out the appropriate examination, generally consider gastrointestinal diseases or heart disease, can take gastroscopy, electrocardiogram, cardiac ultrasound and other auxiliary examinations. 1. Gastrointestinal diseases: such as gastritis, peptic ulcer, gastric cancer and other diseases, usually take gastroscopy, carbon 13 breath test, tissue biopsy and other auxiliary tests can usually confirm the diagnosis. 2. Heart disease: such as coronary heart disease, myocarditis and other diseases, you can go to the hospital to check the electrocardiogram, cardiac ultrasound, cardiac enzymes and other auxiliary tests. 3. Other: Chest X-ray, CT, magnetic resonance and other imaging examinations can also be carried out to rule out whether there are substantial occupational diseases. It is recommended to go to the hospital for examination and treatment as prescribed by the doctor.