Hepatic jugular venous reflux sign is an important part of the physical examination conducted by cardiologists in clinical practice. A positive hepatic jugular venous reflux sign often indicates the presence of cardiac insufficiency and heart failure in patients. 1.Principle: The right atrium and right ventricle of human body receive the blood return from the whole body’s venous system. When the right heart fails, because of the right atrium stasis or right ventricle diastolic restriction, it can’t accept the blood return completely, and some of the blood reflux to the jugular vein, thus causing the jugular vein to fill up more obviously. 2.Checking method: When checking the hepatic jugular venous reflux sign, the patient is asked to be in a flat position, sleeping on a high pillow and breathing with an open mouth. The doctor stands on the right side of the patient and gently presses the right side of the patient’s liver area with the palm of his right hand, and then presses gradually for a few seconds to observe the degree of jugular vein filling; when the examiner stops pressing, the phenomenon of jugular vein filling will disappear immediately. 3.Inspection significance: this sign is important for the doctor to diagnose right heart insufficiency, the hepatic jugular venous reflux sign is negative in healthy people; positive is mainly seen in patients with right heart failure or right heart insufficiency, reflecting the patient’s liver, body circulation stasis and heavy volume load. Hepatic jugular venous reflux sign is important for the determination of cardiac function and volume load, and is a common physical examination tool for doctors, especially cardiologists; during physical examinations, if doctors find a positive hepatic jugular venous reflux sign, they will usually recommend patients to undergo further relevant examinations to clarify the diagnosis and treatment.