Papillary muscle
Encyclopedia : P : PA : PAP : Papillary muscle
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. It is important to note 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.
External links
| Cardiovascular system - Heart - [http://encycl.opentopia.com/ edit] |
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| atria (interatrial septum) | ventricles (interventricular septum) | valves (chordae tendinae, papillary muscle)
right heart: (vena cavae, coronary sinus) → right atrium (fossa ovalis) → tricuspid valve → right ventricle → pulmonic valve
left heart: (pulmonary veins) → left atrium → mitral valve → left ventricle → aortic valve pericardium | epicardium | endocardium | myocardium conduction system: cardiac pacemaker | Purkinje fibers | bundle of His | SA node | AV node |
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