Final answer:
A distended jugular vein is abnormal when it is enlarged and swollen, which can be a sign of increased pressure within the vein. This could be indicative of conditions such as heart failure or liver disease.
Step-by-step explanation:
The distended jugular vein is abnormal when it is enlarged and swollen. This can be a sign of increased pressure within the vein, which could be due to a variety of conditions, such as heart failure, liver disease, or blockage of the vein.
For example, in heart failure, the weakened heart is unable to pump blood effectively, causing fluid to accumulate in the body, including the veins. This increased fluid volume can lead to distension of the jugular vein. Similarly, liver disease can cause a backup of blood in the liver, leading to increased pressure in the veins, including the jugular vein.
Therefore, if a person has a distended jugular vein, it is important for them to see a healthcare professional to determine the underlying cause and receive appropriate treatment.