Sinus rhythm

Definition

Sinus rhythm is the normal heartbeat initiated by the sinoatrial node, characterized by a regular rhythm with a rate of 60 to 100 beats per minute. It indicates proper electrical activity and functioning of the heart in generating pulses.

Related terms

Sinoatrial node: The natural pacemaker of the heart that initiates each heartbeat and sets the pace for sinus rhythm.

Electrocardiogram (ECG): A test that measures the electrical activity of the heart to show whether or not it is beating at a normal sinus rhythm.

Arrhythmia: Any deviation from the normal sinus rhythm, indicating irregularities in the heart's electrical activity