Answer:
Kussmaul's sign
Explanation:
Due to constrictive pericarditis, the pericardium becomes rigid. As a consequence, the filling of the right ventricle during diastole does not happen correctly. The incomplete filling and the constrictive walls make the blood flow back to the veins, which leads to increase pressure in the jugular vein. This malfunction on the jugular pressure due to heart disease is known as Kussmaul's sign.
