What disease is Kussmaul's sign?

Kussmaul's sign usually refers to constrictive pericarditis. Generally, constrictive pericarditis is a heart condition in which patients require targeted treatment under the guidance of a physician. The detailed analysis is as follows:

Constrictive pericarditis is a cardiac disease characterized by chronic inflammation of the thin tissue layer surrounding the heart, leading to thickening, fibrosis, and stiffening of the pericardium. This restricts the heart's ability to expand and fill properly. Because the heart cannot fully relax and fill under constrictive pericarditis, cardiac output becomes limited, impairing blood return and causing systemic venous congestion. Patients often experience symptoms such as dyspnea, shortness of breath, and abdominal distension. Various factors can cause constrictive pericarditis, including tuberculosis and autoimmune diseases. Patients need to actively cooperate with their physicians for treatment. In severe cases, pericardiectomy (surgical removal of adherent pericardium) may be required under medical supervision to relieve cardiac constriction. During treatment, strenuous exercise should be avoided, a positive and optimistic mindset should be maintained, and adequate rest is essential to promote recovery.