II. Pathophysiology
- Heart beat is audible as the Pericardium comes in contact with mediastinal air (Mediastinal Emphysema)
III. Signs
- Crunching sound over the precordium synchronized with the heartbeat (especially in left lateral decubitus position)
IV. Causes: Pneumomediastinum or pneumopericardium
- Tracheobronchial tree injury
- Esophageal Rupture
- Left Spontaneous Pneumothorax
V. References
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Related Studies
| Concepts | Finding (T033) |
| SnomedCT | 414377007 |
| English | Hamman sign, Hamman's sign (finding), Hamman's sign |
| Spanish | signo de Hamman (hallazgo), signo de Hamman |
