What is a knot?

Hello, according to what you said, the knot often has a certain opinion on one thing and has a certain influence in the heart. Wandering around this thing for a long time affects normal life. When you meet a knot, you'd better find a cheerful person or an experienced elder to communicate with. Empathy can often play a role in solving the knot. Sinus node disease, also known as sinus node dysfunction, can cause clinical symptoms such as no heartbeat, angina pectoris, syncope, bradycardia, arrhythmia, organic diseases and abnormalities. It is recommended to do a detailed heart examination, and asymptomatic people do not need treatment. If the heartbeat is too slow, you need to install a permanent pacemaker, which can relieve symptoms and improve the quality of life. Remember to avoid accidents, otherwise it will affect life safety.