| 1. | As the heart chambers contract, so do the papillary muscles.
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| 2. | This has three cusps which are not attached to any papillary muscles.
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| 3. | Rupture of a papillary muscle will cause acute mitral regurgitation.
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| 4. | Rupture or dysfunction of the papillary muscle are also common causes in acute cases,
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| 5. | The PDA supplies the inferior wall, ventricular septum, and the posteromedial papillary muscle.
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| 6. | These cusps are also attached via chordae tendinae to two papillary muscles projecting from the ventricular wall.
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| 7. | Prognosis is worse if a mechanical complication such as papillary muscle or myocardial free wall rupture occurs.
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| 8. | The papillary muscles extend from the walls of the heart to valves by cartilaginous connections called chordae tendinae.
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| 9. | The anterior and posterior papillary muscles of the left ventricle attach via chordae tendineae to the mitral valve.
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| 10. | The semilunar aortic valve is at the base of the aorta and also is not attached to papillary muscles.
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