What is indicated by a normal sinus rhythm in terms of heart rate?

A normal sinus rhythm indicates a heart rate that ranges from 60 to 100 beats per minute (bpm). This range is considered standard for adults, reflecting the rhythm produced by the sinoatrial node, which functions as the natural pacemaker of the heart. Within this range, the heart maintains a balance of efficiency and effectiveness in pumping blood throughout the body, ensuring that sufficient oxygen and nutrients are delivered to tissues and organs. A heart rate below or above this range may indicate underlying conditions or concerns that require further evaluation.