Crux cordis

Crux cordis (Latin for "cross of the heart") is a term used in anatomy to describe the region where the atria and ventricles of the heart meet. This region is significant in the study of cardiology and cardiovascular system due to its role in the heart's structure and function.

Structure

The crux cordis is located at the posterior part of the heart, specifically at the intersection of the atrioventricular septum and the interventricular septum. It is formed by the convergence of the posterior interventricular sulcus and the coronary sulcus, creating a cross-like structure when viewed from the posterior aspect.

Function

The crux cordis is not only a structural landmark but also a functional one. It is the site where the atrioventricular node (AV node) and the bundle of His are located. These structures are crucial in the electrical conduction system of the heart, transmitting electrical signals from the atria to the ventricles, allowing coordinated contraction and efficient blood pumping.

Clinical significance

Understanding the location and function of the crux cordis is important in various clinical scenarios. For instance, in cardiac surgery, surgeons need to be aware of this area to avoid damaging the AV node and bundle of His. In cardiology, the crux cordis can be used as a landmark for interpreting echocardiograms and other imaging studies.

See also

• Heart
• Cardiovascular system
• Atrioventricular node
• Bundle of His