Oblique pericardial sinus
Sinus obliquus pericardii
Definition
The oblique pericardial sinus is a cul-de-sac of the serous pericardium extending superiorly from the inferior vena cava between the two left pulmonary veins on one side and the two right pulmonary veins on the other. Its anterior wall is formed by the posterior wall of the left atrium, between the four pulmonary veins. The oblique sinus provides expansion space for the left atrium.
References
Rehman I, Nassereddin A, Rehman A. Anatomy, Thorax, Pericardium. 2023 Jul 24. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan–. PMID: 29489245.
