sinus rhythm

Sinus rhythm refers to the normal, healthy heartbeat generated by the sinoatrial (SA) node, which is the heart's natural pacemaker located in the upper right chamber. It produces electrical signals that regulate the timing of each heartbeat, ensuring the heart beats in a regular, coordinated way. When in sinus rhythm, the heart rate typically ranges from 60 to 100 beats per minute at rest. This rhythm indicates that the heart's electrical system is functioning properly, allowing efficient blood circulation throughout the body. Deviations from sinus rhythm can suggest underlying heart issues, but its presence usually signifies normal cardiac function.