Final answer:
Jugular venous distension without inspiratory decline is the enlargement of the jugular vein without a decrease in size during inhalation. It can be an indication of certain medical conditions.
Step-by-step explanation:
Jugular venous distension without inspiratory decline refers to the enlargement of the jugular vein without a decrease in size during inhalation. The jugular vein is a major blood vessel in the neck that receives blood from the transverse sinuses and leads to the internal jugular vein through the jugular foramen. The presence of jugular venous distension without inspiratory decline can be an indication of certain medical conditions, such as heart failure or fluid overload.