The sinoatrial node surrounds the sinoatrial artery, which can run centrally ( in 70 % of individuals ) or off center within the node.
32.
These T-type calcium channels are also found in pacemaker cells, the sinoatrial node ( SAN ) and the atrioventricular node ( AV ).
33.
The M 2 muscarinic receptors decrease the heart rate by inhibiting depolarization of the sinoatrial node via coupled receptors and through modulation of muscarinic potassium channels.
34.
Induced sinoatrial node cells could be identified by their distinctive morphology at the site of injection in TBX18-transduced animals, but not in controls.
35.
The sinoatrial node uses calcium to cause a depolarising signal transduction pathway from the atrium through right and left atrioventricular bundle which communicates contraction to the ventricles.
36.
He is also famous for discovering the sinoatrial node, the component of the heart which makes it beat, with his student Martin Flack in 1906.
37.
The cardiac cycle is coordinated by a series of electrical impulses that are produced by specialised pacemaker cells found within the sinoatrial node and the atrioventricular node.
38.
During each heartbeat, a healthy heart has an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the pacemakers.
39.
Any part of the heart that initiates an impulse without waiting for the sinoatrial node is called an ectopic focus and is, by definition, a pathological phenomenon.
40.
In the heart, cells in the sinoatrial node ( and, as backup, in the atrioventricular node ) contain cyclic nucleotide gated channels which determine the heart rhythm.
