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:
“Behold that great Plotinus swim
Buffeted by such seas;
Bland Rhadamanthus beckons him,
But the Golden Race looks dim,
Salt blood blocks his eyes.”
—William Butler Yeats (1865–1939)
“One cool judgment is worth a thousand hasty counsels. The thing to do is to supply light and not heat.”
—Woodrow Wilson (1856–1924)