Friedreich's sign

In medicine, Friedreich's sign is the exaggerated drop in diastolic central venous pressure seen in constrictive pericarditis (particularly with a stiff calcified pericardium) and manifested as abrupt collapse of the neck veins or marked descent of the central venous pressure waveform.

Friedreich's sign
Differential diagnosisconstrictive pericarditis

The sign is named after Nikolaus Friedreich.[1]


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