Vieussens valve of the coronary sinus

The Vieussens valve of the coronary sinus is a valve and anatomic landmark between the coronary sinus and the great cardiac vein. It is often a flimsy valve composed of one to three leaflets found in 80% to 90% of people. It is clinically important because it is often an obstruction to catheters in 20% of patients.[1][2]

References

Ho S, Becker AE. Chapter 37. Anatomy of Electrophysiology. In: Fuster V, Walsh RA, Harrington RA, eds. Hurst's The Heart. 13th ed. New York: McGraw-Hill; 2011. http://www.accessmedicine.com/content.aspx?aID=7812984. Accessed November 1, 2011.
Strohmer B (September 2008). "Valve of Vieussens: an obstacle for left ventricular lead placement". Can J Cardiol 24 (9): e63. PMC 2643183. PMID 18787728.

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[1] Ho S, Becker AE. Chapter 37. Anatomy of Electrophysiology. In: Fuster V, Walsh RA, Harrington RA, eds. Hurst's The Heart. 13th ed. New York: McGraw-Hill; 2011. http://www.accessmedicine.com/content.aspx?aID=7812984. Accessed November 1, 2011.

[2] Strohmer B (September 2008). "Valve of Vieussens: an obstacle for left ventricular lead placement". Can J Cardiol 24 (9): e63. PMC 2643183. PMID 18787728.