when does the backup pacemaker in the av node initiate an impulse to pace the heart
Cardiac pacemaker If the SA node does not function properly and is unable to control the heart rate, a group of cells further down the heart will become the ectopic pacemaker of the heart. These cells form the atrioventricular node (or AV node), which is an area between the left atrium and the right ventricle within the atrial septum, will take over the pacemaker responsibility.
Steve Irwin Irwin died at 44, after being pierced in the heart by a stingray barb while filming an underwater documentary film titled Ocean's Deadliest.
Coronary artery disease Chest pain that occurs regularly with activity, after eating, or at other predictable times is termed stable angina and is associated with narrowings of the arteries of the heart.
Alex McArthur Alex McArthur (born March 6, 1957) is an American actor.