Blood Supply
In the majority of individuals, the SA node receives blood from the right coronary artery, meaning that a myocardial infarction occluding it will cause ischaemia in the SA node unless there is a sufficiently good anastomosis from the left coronary artery. If not, death of the affected cells will stop the SA node from triggering the heartbeat, and pacemaker function will be manifest more distal in the cardiac system (e.g. AV node).
Read more about this topic: Sinoatrial Node
Famous quotes containing the words blood and/or supply:
“It is a strange, strange fate, and now, as I stand face to face with death I feel just as if they were going to kill a boy. For I feel like a boy—and my hands so free from blood and my heart always so compassionate and pitiful that I cannot comprehend how anyone wants to hang me.”
—Roger Casement (1864–1916)
“Municipal laws are a supply to the wisdom of each individual; and, at the same time, by restraining the natural liberty of men, make private interest submit to the interest of the public.”
—David Hume (1711–1776)