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Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Papillary muscle

Introduction

Template:Infobox Anatomy

Overview

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.

  • Image courtesy of Hartwig, Walter C., The Editor of Fundamental Anatomy, 1st Edition, 2008 and copyrighted
    Image courtesy of Hartwig, Walter C., The Editor of Fundamental Anatomy, 1st Edition, 2008 and copyrighted
  • Image courtesy of Hartwig, Walter C., The Editor of Fundamental Anatomy, 1st Edition, 2008 and copyrighted
    Image courtesy of Hartwig, Walter C., The Editor of Fundamental Anatomy, 1st Edition, 2008 and copyrighted
Additional images

Additional images

  • Section of the heart showing the ventricular septum.
    Section of the heart showing the ventricular septum.
  • Schematic representation of the atrioventricular bundle of His.
    Schematic representation of the atrioventricular bundle of His.
References

References

de:Papillarmuskel nl:Papillairspieren

Template:WikiDoc Sources

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Cafer Zorkun, M.D., Ph.D. [2]