Why is an arrow drawn between the av node and the qrs wave?

What is the normal cholesterol level for a female age 30-35? How can the main artery rupture as a result of a tonsillectomy? Can I still get pregnant 5 days after I ovulated? Can you still go to braces appoiments while pregnant? How to bring the swelling down in my mouth? What is an Anterior impression on the thecal sac? Can a woman with FASD give birth to normal child? Do you have to wear the pink ribbon on your chest? What pathological conditions are indicated if glucose are present in urine? How do you administrate TCID50 and EID50? What bones other than vertebrae are prone to fracture in osteoporosis? In Part III of rime of the ancient mariner why does the Mariner draw blood from his arm? How many people that come to AA are NOT alcoholic? What is an ascending colon? What are two inputs for digestive system? If you have a rash on your legs from carpet does it mean im allergic to carpet? What to do if you get a swollen leg? Is radiculopathy l5 mean damage nerve? How does salt prevent dehydration? If your mother-in-law has been diagnosed with colon cancer Stage III and surgery was performed to remove a tumor and lymph nodes what is the best accessment one can give for the prognosis?