papillary muscle


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pap·il·lar·y mus·cle

[TA]
one of the group of myocardial bundles that terminate in the chordae tendineae that attach to the cusps of the atrioventricular valves; each ventricle has an anterior and a posterior papillary muscle; the right ventricle sometimes has a septal papillary muscle.
Synonym(s): musculus papillaris cordis [TA]
Farlex Partner Medical Dictionary © Farlex 2012

pap·il·lar·y mus·cle

(pap'i-lar-ē mŭs'ĕl) [TA]
One of the group of myocardial bundles that terminate in the chordae tendineae that attach to the cusps of the atrioventricular valves; each has an anterior and a posterior papillary muscle; the right ventricle sometimes has a septal papillary muscle.
Synonym(s): musculus papillaris [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

papillary muscle

Internal conical heart muscles. Origin: ventricular wall. Insertion: tricuspid and mitral valve leaflets via chordae tendinae. Action: anchor leaflets of valves during heart contractions.
See also: muscle
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Mechanical properties of mitral valve apparatus depend to large extend on the link between papillary muscle and valve that transmit contractions of the muscle to the valve leaflets.
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.
Obstructive cardiomyopathy without severe septal hypertrophy, for example, from papillary muscle abnormalities or abnormal chordal attachment, is not as recognized as the more widely known hypertrophic obstructive cardiomyopathy with severe septal hypertrophy (HOCM) but can also lead to symptoms due to left ventricular outflow obstruction and decreased cardiac output.
The evaluation of in vitro myocardial function using isolated papillary muscle in basal condition is represented in Table 3.
Mamtha et al classified them into simple type if they are attached from septum to the base of papillary muscle and complex type depending in their branching pattern.
Rupture of papillary muscle as cause of sudden death.
Improvement in Cardiac Function After Bypass Grafting, With or Without Suturing of Left Ventricular Papillary Muscles Average increase Average increase after bypass grafting after bypass grafting plus suturing only Measure (n = 8) (n = 32) Cardiac reserve 168% 14% Peak cardiac power output 83% 11% Peak cardiac output 35% 6% Exercise duration 33% 18% Peak V[O.sub.2] 21% 9% Source: Dr.
The arrow indicates the false tendon; The star indicates the papillary muscles.
To make the electrode impalement technique more efficient, obtain a greater amount of experimental data, and have more precise current threshold values, the microelectrode recording the APs remains fixed somewhere in the biological preparation, and the other microelectrode is impaled into many other sites of the papillary muscle for the determination of their thresholds.
Student's t-test was used to analyze the results for nutritional profile, comorbidities, cardiac macroscopic and echocardiographic parameters, papillary muscle function at baseline condition, and calcium handling proteins expression.

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