Talk:Hamman's sign
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This sound is heard best over the left lateral position. It has been described as a series of precordial crackles that correlate with the heart beat and not the respirations. Hamman's crunch is caused by pneumomediastinum or pneumopericardium. This is sometimes seen in patients with esophageal rupture.--Cmangum 06:59, 1 January 2007 (UTC)