In clinical practice, angiography is a broad category, and there are many types of angiography in clinical practice, each with its own indications. Coronary angiography, including for atypical chest pain, typical angina symptoms, non-invasive examination suggesting myocardial ischemic changes, unexplained arrhythmias, etc. 3, tubal angiography, for examining tubal diseases, reproductive organ malformations, chronic inflammation of reproductive organs, etc. 4, gastrointestinal angiography, suitable for those with various digestive system symptoms.