Which of the following are rules for atrial fibrillation? Select all that apply

A. While vitamin K plays a role in immune function, its administration prior to surgery primarily aims to correct potential clotting abnormalities rather than prevent infection.

B. Vitamin K does not affect gastric secretions. Its role in this context is unrelated to gastric function.
C. While vitamin K is involved in various physiological processes, its administration prior to surgery is primarily aimed at preventing bleeding complications by ensuring adequate clotting factor synthesis.
D. Vitamin K is essential for the synthesis of clotting factors in the liver.

Administering vitamin K prior to surgery helps ensure adequate levels of clotting factors, reducing the risk of bleeding during and after the procedure.

A. While patients receiving chemotherapy are at risk for infections due to immunosuppression, the risk of overwhelming infection, particularly from encapsulated bacteria, is higher in post-splenectomy patients due to impaired immune function without the spleen.
B. Patients with sickle cell anemia are at increased risk of infections, particularly from encapsulated bacteria, due to functional asplenia or hyposplenism, but the risk of overwhelming infection is highest in post-splenectomy patients.
C. Patients with multiple myeloma are immunocompromised and at increased risk of infections, but they do not have the same risk of overwhelming infection as post- splenectomy patients.
D. Post-splenectomy patients are at highest risk of overwhelming infection due to impaired immune function resulting from the absence of the spleen, which plays a crucial role in immune surveillance and defense against encapsulated bacteria.