Persistent left superior vena cava is the most common congenital anomaly of thoracic venous return. which results when the left anterior cardinal vein fails to regress. A 41-year-old African American male with a history of an unspecified childhood cardiac murmur presented to the emergency department with congestive heart failure exacerbation revealing an incidental finding of a persis... https://www.parisnaturalfoodes.shop/product-category/dong-quai-root-c-s/