Papillary muscle
From Wikipedia, the free encyclopedia
| Papillary muscle | |
|---|---|
| Interior of right side of heart. | |
| Diagram showing relations of opened heart to front of thoracic wall. Ant. Anterior segment of tricuspid valve. A O. Aorta. A.P. Anterior papillary muscle. In. Brachiocephalic artery (Innominate). L.C.C. Left common carotid artery. L.S. Left subclavian artery. L.V. Left ventricle. P.A. Pulmonary artery. R.A. Right atrium. R.V. Right ventricle. V.S. Ventricular septum. | |
| Latin | musculus papillaris |
| Gray's | subject #138 532 |
| Dorlands/Elsevier | m_22/12550081 |
In anatomy, the papillary muscles of the heart serve to limit the movements of the mitral and tricuspid valves and prevent them from being inverted. They do not close or open the valves, which close passively in response to pressure gradients. Instead they brace the valves against the high pressure.
The U wave in an ECG represents papillary muscle repolarization. It usually does not appear unless a patient's electrolytes are imbalanced.
[edit] Additional images
Section of the heart showing the ventricular septum. |
Schematic representation of the atrioventricular bundle of His. |
[edit] External links
- Dictionary at eMedicine papillary+muscle
- SUNY Labs 20:19-0106 - "Heart: The Right Atrioventricular (Tricupsid) Valve" (anterior, posterior, septal papillary muscles)
- SUNY Labs 20:26-0105 - "Heart: The Left Atrioventricular (Mitral) Valve" (anterior, posterior papillary muscles)
- GPnotebook -1368719301
- Bioweb at UWLAX Human heart model (left internal anatomy)
- Atlas of anatomy at UMich ht_rt_vent - "Right atrioventricular bundle branch, anterior view"
- Definition of Papillary muscle
- MedicineNet Search Results
