Conus artery

The conus artery (third coronary artery) is a coronary artery that is present in only 45 percent of human hearts.^[1]^[2] The conus artery may provide collateral blood flow to the heart when the left anterior descending artery is occluded.^[3] In one study, 305 cadaveric specimens were examined to determine the origin of the conus coronary artery. The authors found that the conus artery could arise independently from the aorta or from a common ostium with the right coronary artery.^[2]

References

↑ Schlesinger MJ, Zoll PM, Wessler S (1949). "The conus artery: a third coronary artery". American Heart Journal. 38 (6): 823–38. doi:10.1016/0002-8703(49)90884-4. PMID 15395916.
1 2 Edwards BS, Edwards WD, Edwards JE (1981). "Aortic origin of conus coronary artery. Evidence of postnatal coronary development". British Heart Journal. 45 (5): 555–558. doi:10.1136/hrt.45.5.555. PMC 482564. PMID 7236461.
↑ Wynn GJ, Noronha B, Burgess MI (2008). "Functional significance of the conus artery as a collateral to an occluded left anterior descending artery demonstrated by stress echocardiography". International Journal of Cardiology. 140 (1): e14–5. doi:10.1016/j.ijcard.2008.11.039. PMID 19108914.

Arteries of the torso and chest

Lungs

Pulmonary artery
- Right
- Left (Ligamentum arteriosum)

Heart

Left coronary:
- Anterior interventricular
- Left circumflex (Left marginal)

Aorta

Sections

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) Costocervical trunk: Highest intercostal (Posterior intercostal 1–2) Deep cervical

Descending
aorta

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