Papillary muscle

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Overview
In anatomy, the papillary muscles of the heart serve to limit the movements of the mitral and tricuspid valves. These muscles contract to tighten the chordae tendineae, which in turn prevent inversion. This occurs in response to pressure gradients. Instead they brace the valves against the high pressure, preventing regurgitation of ventricular blood back into the atrial cavities.

Additional Reading

 * Hartwig, Walter C., Fundamental Anatomy, 1st ed., 2007 ISBN 978-0-7817-6888-7
 * Moss and Adams' Heart Disease in Infants, Children, and Adolescents Hugh D. Allen, Arthur J. Moss, David J. Driscoll, Forrest H. Adams, Timothy F. Feltes, Robert E. Shaddy, 2007 ISBN 0781786843
 * Braunwald's Heart Disease, Libby P, 8th ed., 2007, ISBN 978-1-41-604105-4
 * Hurst's the Heart, Fuster V, 12th ed. 2008, ISBN 978-0-07-149928-6
 * Willerson JT, Cardiovascular Medicine, 3rd ed., 2007, ISBN 978-1-84628-188-4

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