Skip to main content
Glite Dictionary
sinoatrial

sinoatrial

1 7.9
Relating to the small group of heart cells that control the heartbeat rhythm
  • adjective
  • /ˌsaɪnoʊˈeɪtriəl/
  • Specialized
translation icon : sinoauricular
  • sinoatrial node

But the heart has the sinoatrial node, which actually has a brain in it.

Examples

  • But the heart has the sinoatrial node, which actually has a brain in it.

    André Duqum

  • The increase in sympathetic tone results in the shortening of the sinoatrial node recovery time.

    Academic text (2007)

  • It begins in the sinoatrial node and spreads through the heart.

    Academic text (2011)

  • The sinoatrial node is essential for maintaining a regular heartbeat.

  • Located in the right atrium, the sinoatrial node initiates the heartbeat by generating electrical impulses.

  • Abnormalities in the sinoatrial node can lead to irregular heart rhythms.

Compounds

sinoatrial node
  • Specialized
1 5.8

A small group of cells in the heart's right upper chamber that makes the heartbeat regular

How Normal

sinoatrial
  • Specialized
1 7.9
heart rhythm
  • Specialized
7 3.0

Surface Forms

sinoatrial positive

Morphology

sinoatrial = atrial (transparent) = sino + atrial

Formed by the combining form 'sino-' (sinus) attached to 'atrial' so the adjective directly means 'relating to the sinus/atrium' if the bases are known.

Etymology

Sinoatrial comes from the parts sinus 'a cavity or curve', as in the sinuses in the nose, and atrium 'entrance hall', like the hall of a house. So sinoatrial names the area of the heart by those parts, and that area contains the small group of cells that set the heartbeat rhythm.