People with sinus bradycardia seek prompt medical attention, which may include an electrocardiogram, echocardiogram, exercise or tilt test, and laboratory tests, depending on the disease. 1. Electrocardiography. Routine electrocardiogram can observe the presence of arrhythmia, myocardial infarction and other diseases; after the situation is relatively stable, 24-hour dynamic electrocardiogram can also be performed to detect the presence of arrhythmia. 2. Echocardiography. It can determine whether there is any abnormality in the structure and function of the heart. 3. Exercise or tilt test. Exercise test can observe the change of heart rate during exercise; tilt test can mainly determine whether bradycardia or even fainting occurs under the change of body position. 4. Laboratory tests (1) Blood test. It can determine whether there is thrombocytopenia, anemia, infection and so on. (2) Coagulation test. It can determine whether there is any abnormality in the coagulation function of the body. (3) Liver and kidney function test. It can determine whether the liver and kidney functions of the organism are normal. (4) Blood gas analysis. It can determine whether there is acidosis, respiratory failure and other conditions. (5) Cardiac enzymes and troponin examination. It can judge whether there is acute myocardial infarction. 5. Sleep monitoring. Sleep monitoring can determine whether bradycardia is due to sleep apnea.