Sinuatrial nodal artery

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Artery: Sinoatrial nodal artery

Low magnification micrograph of a sinoatrial node (central on image), which surroundings the sinuatrial nodal artery (on lumen in the image). H&E stain.

Arteries: RCA = right coronary AB = atrial branches SANB = sinuatrial nodal RMA = right marginal LCA = left coronary CB = circumflex branch LAD/AIB = anterior interventricular LMA = left marginal PIA/PDA = posterior descending MARG = left marginal AVN = atrioventricular nodal Veins: SCV = small cardiac ACV = anterior cardiac AIV/GCV = great cardiac MCV = middle cardiac CS = coronary sinus
Latin	Ramus nodi sinuatrialis arteriae coronariae dextrae

The sinuatrial nodal artery (or sinoatrial nodal artery) is an artery of the heart which supplies the sinoatrial node, and arises from the right coronary artery in around 60% of people. In about 40% of cases, the sinoatrial artery is a branch of the left coronary artery or one of its branches. ^[1] The origin of the sinoatrial node artery is not related to coronary artery dominance. In contrast, the atrioventricular nodal branch is dependent on coronary artery dominance.

Additional images

Sternocostal surface of heart (right coronary artery visible at left)

References

↑ Pejković B, Krajnc I, Anderhuber F, Kosutić D (July 2008). "Anatomical aspects of the arterial blood supply to the sinoatrial and atrioventricular nodes of the human heart". Journal of International Medical Research 36 (4): 691–8. PMID 18652764.

External links

sinuatrial+%28S-A%29+nodal+branch+of+right+coronary+artery at eMedicine Dictionary
1443233852 at GPnotebook

List of arteries of torso · chest (TA A12.2.01–04,11, GA 6.598)

Pulmonary

Coronary

Left coronary: Anterior interventricular

Left circumflex (Left marginal)

Ascending aorta/
aortic arch

Brachiocephalic	Thyreoidea ima Right subclavian Right common carotid

Left common carotid	External carotid Internal carotid Carotid body Carotid sinus Carotid bifurcation

Left subclavian	Internal thoracic: Anterior intercostal Thymic Pericardiacophrenic Perforating branches terminal (Musculophrenic, superior epigastric) Kacheshmarova's artery (Arteria xiphia (Arteria africana)) Costocervical trunk: Highest intercostal (Posterior intercostal 1–2) Deep cervical

Other	Aortic body

Descending/
thoracic aorta

M: VAS

anat (a:h/u/t/a/l,v:h/u/t/a/l)/phys/devp/cell/prot

noco/syva/cong/lyvd/tumr, sysi/epon, injr

proc, drug (C2s+n/3/4/5/7/8/9)

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