Vena obliqua atrii sinistri

Vena obliqua atrii sinistri

Latin	Vena obliqua atrii sinistri

The Vena obliqua atrii sinistri, also known as the oblique vein of the left atrium or Marshall's vein, is a small vein found in the heart. It is a remnant of the left superior vena cava and is located on the posterior surface of the left atrium.

Structure

The Vena obliqua atrii sinistri originates from the pulmonary veins entering the left atrium and typically drains into the coronary sinus. It runs obliquely on the posterior surface of the left atrium. This vein is variable in size and may be absent in some individuals.

Function

The primary function of the Vena obliqua atrii sinistri is to drain blood from the myocardium of the left atrium into the coronary sinus. However, due to its small size and variable presence, its role in overall cardiac function is considered minor.

Clinical Significance

The Vena obliqua atrii sinistri is of interest primarily in cardiovascular surgeries and diagnostic procedures. It may be involved in the pathway of cardiac arrhythmias and could be a site for ablation in the treatment of atrial fibrillation. Its recognition is also important during procedures involving the coronary sinus, such as pacemaker or defibrillator lead placement.

See Also

• Heart
• Coronary circulation
• Cardiac anatomy