The sinoatrial (SA) node is a section in the right atrium of the heart that regulates the timing and rate of cardiac muscle contractions, acting as the pacemaker.
sinoatrial (SA) node: Una región en la aurícula derecha del corazón que establece la velocidad y el tiempo en que todas las células del músculo cardíaco se contraen; el marcapasos.
| Front | sinoatrial (SA) node |
|---|---|
| Back | A region in the right atrium of the heart that sets the rate and timing at which all cardiac muscle cells contract; the pacemaker. |
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