papillary muscle


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Related to papillary muscle: Moderator band, Trabeculae carneae, Trabeculæ carneæ

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]

papillary muscle

any one of the rounded or conical muscular projections attached to the chordae tendineae in the ventricles of the heart. The papillary muscles vary in number. The two main muscles are the anterior papillary muscle and the posterior papillary muscle. The papillary muscles are associated with the atrioventricular valves that they help open and close. Compare chordae tendineae, trabecula carnea.

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] .

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
References in periodicals archive ?
Cardiac magnetic resonance imaging (CMRI) can play an important role in confirming the diagnosis, especially differentiating trabeculae from aberrant bands, false tendons, and abnormal insertion of papillary muscles.
A positive inotropic effect of PHB on papillary muscle was also observed in the experiment; the detailed data is not shown.
The electron microscopic appearance of mitochondria from nonischemic posterior papillary muscles was compared with that of the ischemic anterior papillary muscle in the animals that had undergone only 10 or 15 min of coronary occlusion.
Real-time three dimension TEE demonstrating the accessory papillary muscle extending from the interventricular septum to the LVOT
The procedure, which involves graded placation of the papillary muscles through a small, apical incision, usually takes about 15-20 minutes, said Dr.
Among 97 patients having mitral valve replacement for pure MR from 1968 to 1981 at the National Heart, Lung, and Blood Institute, MVP was responsible in 60 patients (62%), papillary muscle dysfunction from coronary heart disease in 29 (30%), infective endocarditis in 5 (5%), and possibly rheumatic disease in 3 (3%) (52).
Transthoracic echocardiography revealing 9/5 mmHg pressure gradient across the mitral valve (A), agitated saline injection resulting in opacification of the dilated coronary sinus and subsequently the right atrium (B), three-dimensional transthoracic echocardiography (3D TTE) revealing characteristic findings of PMV including solitary papillary muscle (Figure and Video C, E), funnel shape of mitral valve (Figure and Video F), doming shape of elongated chordae tendinea (Figure and Video C, E) and pear-like shape of left atrium (Figure and Video C, D, E).
Results of valve replacement for severe mitral regurgitation due to papillary muscle rupture or fibrosis.
The tumor was originated from the mitral chordae without showing an association with papillary muscle or mitral leaflets.
In the apical four-chamber view, both the basal septal and basal lateral segments and anterolateral papillary muscle, from the apical long axis view basal posterior segment and posteromedial papillary muscle were assessed.

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