papillary muscles


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papillary muscles

The finger-like muscular processes arising from the floors of the VENTRICLES of the heart to which are attached the strings (chordae tendineae) that tether the cusps of the atrioventricular valves.
References in periodicals archive ?
Morphologically, the papillary muscles can be classified as conical, mammillated, flat topped, grooved, stepped, wavy, arched, sloped, saucerised, two tiered, interlinked, parallel, V, Y or H-shaped.
Papillary muscle thickening and shortening probably contributed to the tricuspid and mitral regurgitation.
However, the surgical treatment of ischemic mitral insufficiency continues to evolve and new methods addressing ventricular structures are being introduced: left ventricular restoration, papillary muscle relocation, sling, imbrication or reapproximation, chordal cutting or translocation.
The chordae tendineae was measured from tip of papillary muscles to the edges of the cusp in cadaveric human hearts (Figure 1) and compared with that of autopsied heart specimen's mitral valves.
It helps us look at structures like the papillary muscles, and allows us to see scar tissue in the heart," he explains.
The U wave is believed to represent repolarization of the papillary muscles or Purkinji fibers.
The procedure, which involves graded placation of the papillary muscles through a small, apical incision, usually takes about 15-20 minutes, said Dr.
Papillary muscles with the corresponding chordae tendineae were obtained from human and pig (Sus scrofa) hearts after exposition of the left ventricle cavity, fixed with 4% formaldehyde.
We carefully examined the anterior papillary muscles, which are the end-organs for the coronary flow from the left anterior descending coronary artery and thus are the most vulnerable for ischemia.
However, two patients who presented with severe myocardial dysfunction (LVEF was 34% and 38%, respectively) upon diagnosis still displayed abnormal features, such as echo-dense papillary muscles and endocardium, despite normal LVEF.

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