Abnormality of venous physiology Abnormal jugular venous pressure 2016-05-17T07:58:17Z UMLS:C0520860 SNOMEDCT_US:62436006 An anomaly of the jugular venous pressure. The internal jugular veins, being continuous with the superior vena cava, provide a visible measure of the degree to which the systemic venous reservoir is filled. The vertical height above the right atrium to which they are distended and above which they are in a collapsed state provides an imperfect reflection of the right atrial pressure.