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]

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 ?
However, it should be borne in mind that multiple attempts may cause inadvertent injury, especially to the delicate subvalvular apparatus, formed by the tendinous cords and papillary muscles.
In successful cases of extended septal myectomy, mitral valvuloplasty and papillary muscle release (Fig.
It must be determined that the contrast only goes to the septum near the point of mitral-septal contact and not elsewhere; for example, not to the right ventricle, LV papillary muscles or in the LV free wall.
Patients received either an extended myectomy alone, a myectomy plus either papillary muscle release or mitral leaflet plication, or the total RPR procedure.
Extended septal myectomy for hypertrophic obstructive cardiomyopathy with anomalous mitral papillary muscles or chordae.
Ischemic myocardial necrosis and papillary muscle dysfunction in infants and children.
Anterolateral (anterior) papillary muscle arises from the concavity of the anterolateral free wall of the left ventricle.

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