A 39-year-old pregnant patient with acute appendicitis was planned for emergency laparoscopic appendectomy in the second trimester of pregnancy. Preoperative two-dimensional transthoracic echocardiography revealed asymptomatic cor triatriatum sinisiter (CTS). dividing left atrium into two chambers. There was no associated cardiac anomaly. https://cuttingedgecutleryco.shop/product-category/strop/