Today I saw a doctor-patient communication about the relationship between ECG, cardiac ultrasound and cardiac angiography on the Internet, and I found it very interesting, so here is an excerpt: –Patient: Do you need to do ECG, cardiac ultrasound and cardiac angiography? Do one can not do that? – doctor: ultrasound is to see how big the house, leaking water, ECG to see whether the circuit is open or not, imaging to check whether the pipe is blocked, the pipe rusted into what kind of no one knows. The three tests are irreplaceable! I believe such an analogy can be understood by all patients. So in the face of the patient, the use of such an apt image of the metaphor, it is easy to achieve the purpose of communication, but also a lubricant in the doctor-patient communication!