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Etymology: Adolf Kussmaul; L, signum, mark
1 a paradoxic rise in venous pressure with distension of the jugular veins during inspiration, as seen in constrictive pericarditis or mediastinal tumor.
2 conditions of convulsions and coma associated with a GI disorder caused by absorption of a toxic substance.
Elevation of the neck veins (and of the central venous pressure) during inspiration, a visible indication of pericardial effusion or tamponade or of other disorders that affect the filling of the right side of the heart (e.g., severe obstructive lung disease).
See also: Kussmaul, Adolph