What would be an expected finding for sinus rhythm on an ECG?

In sinus rhythm, one of the key characteristics observed on an electrocardiogram (ECG) is a consistent heart rate accompanied by a normal P-QRS-T sequence. This means that the electrical activity generated by the sinoatrial (SA) node is regular and organized, leading to a predictable and steady rhythm.

The presence of normal P waves before each QRS complex indicates proper atrial depolarization, which is crucial for maintaining an efficient heartbeat. The intervals between the beats are uniform, confirming that the heart rhythm originates from the sinus node, which is the primary pacemaker of the heart. This orderly pattern is vital for effective cardiac function and ensures that blood is pumped adequately throughout the body.

A consistent heart rate typical of sinus rhythm usually falls within a range of 60 to 100 beats per minute in adults, without significant deviations that would suggest other types of dysrhythmias. This is why the finding of a consistent heart rate along with a normal P-QRS-T sequence directly reflects a healthy and functioning sinus rhythm on an ECG.