Left margin of heart

Left margin of heart
Left margin of heart
Gray492.png
Sternocostal surface of heart.
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Heart seen from above.
Gray's subject #138 528

The left margin of heart (or obtuse margin) is shorter than the right border of heart, full, and rounded: it is formed mainly by the left ventricle, but to a slight extent, above, by the left atrium.

It extends from a point in the second left intercostal space, about 2.5 mm. from the sternal margin, obliquely downward, with a convexity to the left, to the apex of the heart.

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

v · d · eAnatomy of torso, cardiovascular system: heart (TA A12.1, TH H3.09.01, GA 5.524)
General
Surface
Internal
Chambers
Layers

M: HRT

anat/phys/devp

noco/cong/tumr, sysi/epon, injr

proc, drug (C1A/1B/1C/1D), blte



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Look at other dictionaries:

  • left margin of heart — the rounded margin separating the sternocostal and left surfaces of the heart, formed mainly by the left ventricle but also including a small part of the left atrium and extending obliquely from the left atrium to the apex of the heart in a curve …   Medical dictionary

  • obtuse margin of heart — left m. of heart …   Medical dictionary

  • left border of heart — see under margin …   Medical dictionary

  • inferior margin of heart — the sharp edge between the sternocostal and diaphragmatic surfaces of the heart, formed mainly by the right ventricle and slightly by the left ventricle, near the apex. Called also inferior border, acute border, or acute m. of heart …   Medical dictionary

  • Left marginal artery — Artery: Left marginal artery Base and diaphragmatic surface of heart. (Left marginal artery not visible, but would be near center left.) …   Wikipedia

  • obtuse border of heart — left margin of heart …   Medical dictionary

  • Left marginal vein — Infobox Vein Name = PAGENAME Latin = GraySubject = 166 GrayPage = 642 Caption = Base and diaphragmatic surface of heart. (Left marginal vein labeled at center left.) Caption2 = DrainsFrom = left ventricle Source = DrainsTo = great cardiac vein… …   Wikipedia

  • left — 1 /left/ adjective (only before noun) 1 on the side of your body that contains your heart: She held out her left hand. opposite right 1 (4a) 2 on, by, or in the direction of your left side: Hank had scribbled notes in the left margin. | Take a… …   Longman dictionary of contemporary English

  • Right border of heart — Sternocostal surface of heart. (Right margin visible but not labeled.) Latin margo dexter cordis Gray s …   Wikipedia

  • Fibrous rings of heart — Infobox Anatomy Name = PAGENAME Latin = anulus fibrosus dexter cordis, anulus fibrosus sinister cordis GraySubject = 138 GrayPage = 536 Caption = Caption2 = System = Precursor = MeshName = MeshNumber = DorlandsPre = a 50 DorlandsSuf = 12143716… …   Wikipedia

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