What characteristic is typical of normal sinus rhythm?

Normal sinus rhythm is characterized by a regular rhythm with a consistent pace, which means that the heartbeat occurs at a steady rate and follows a predictable pattern. This rhythm is initiated by electrical impulses from the sinoatrial (SA) node, the heart's natural pacemaker, leading to uniformity in the intervals between heartbeats.

The heart rate in normal sinus rhythm is typically between 60 and 100 beats per minute, which is considered normal for a resting adult. This regularity in the heart's electrical activity ensures efficient pumping of blood throughout the body, providing proper perfusion to organs and tissues.

In contrast to the characteristics of normal sinus rhythm, varied electrical activity, irregular heartbeats, and fast fluctuations in rhythms suggest abnormal heart rhythms, such as arrhythmias, which can lead to inefficient heart function and possible health complications. These irregularities do not provide the stability and reliability of a normal heartbeat, making those patterns distinct from the expected characteristics of a normal sinus rhythm.