a crunching, rasping sound, synchronous with heart beat, heard over the precordium and sometimes at a distance from the chest in mediastinal emphysema.
Hamman signA substernal crepitance, which is typically synchronous with the heartbeat, caused by percolation of air into the mediastinum.
Hamman signPhysical exam A crunching sound synchronous with heartbeat, which may be heard in Pts with mediastinal emphysema, pneumopericardium
Ham·man sign(ham'ăn sīn)
Hamman,Louis, U.S. physician, 1877-1946.
Hamman disease - Synonym(s): Hamman syndrome
Hamman murmur - Synonym(s): Hamman sign
Hamman sign - a crunching, rasping sound, synchronous with heartbeat, heard over the precordium and sometimes at a distance from the chest in mediastinal emphysema. Synonym(s): Hamman murmur
Hamman syndrome - spontaneous mediastinal emphysema, resulting from rupture of alveoli. Synonym(s): Hamman disease
Hamman-Rich syndrome - Synonym(s): usual interstitial pneumonia of Liebow