The crux cordis or crux of the heart (from Latin "crux" meaning "cross") is the area on the lower back side of the

heart The heart is a muscular organ in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to t ...

where the

coronary sulcus The coronary sulcus (also called coronary groove, auriculoventricular groove, atrioventricular groove, AV groove) is a groove on the surface of the heart at the base of right auricle that separates the atria from the ventricles. The structure co ...

(the groove separating the atria from the ventricles) and the

posterior interventricular sulcus The posterior interventricular sulcus or posterior longitudinal sulcus is one of the two grooves that separates the ventricles of the heart The heart is a muscular Organ (biology), organ in most animals. This organ pumps blood through th ...

(the groove separating the left from the right ventricle) meet. It is important surgically because the atrioventricular nodal artery, a small but vital vessel, passes in proximity to the crux of the heart. It is the anastomotic point of right and left coronary artery.

References

Cardiac anatomy {{circulatory-stub