Which aortic valve leaflet is closest to the interatrial septum?

The aortic valve consists of three cusps: the left coronary cusp, the right coronary cusp, and the non-coronary cusp. Among these, the non-coronary cusp is positioned closest to the interatrial septum. This anatomical relationship is significant during procedures involving the aorta and the left atrium, as well as in understanding the dynamics of blood flow and the configuration of the heart structures.

The non-coronary cusp is located at the midline or posterior aspect of the aortic valve, which aligns it closely with the interatrial septum. This positioning allows it to play a crucial role in the hemodynamics of the heart, especially as it relates to blood flow from the left ventricle into the aorta. Recognizing this anatomical detail is essential for interpreting echocardiographic findings and conducting interventions.

Understanding the specific location of the non-coronary cusp in relation to other structures like the atrial septum is important for clear communication during clinical discussions and for making informed decisions during diagnostic and therapeutic procedures related to the heart.