Peripheral vascular signs are more common in clinical practice and include the following manifestations: 1. Gunshot sounds, this vascular murmur can only be heard on the surface of relatively large arteries. The most common choice is the femoral artery at the root of the thigh, where a gunshot-like murmur can be heard with the stethoscope, and this murmur is often consistent with the heartbeat; 2. Duroziez double murmur, which also requires the selection of a larger artery, often the femoral artery, and requires the stethoscope to exert slight pressure on the artery, and the murmur can be heard both in systole and diastole; 3. Capillary pulsation sign, which is mainly observed The capillaries of the terminal capillaries are most often selected from the fingernails, and generally a slight pressure on the nail can make the nail white. However, in patients with aortic insufficiency, the alternating red and white phenomenon consistent with the heartbeat can appear at the edge of the whitening of the nail, which is called capillary pulsation sign.