What term is used to describe an electrocardiogram that is within normal limits?

The term used to describe an electrocardiogram that is within normal limits is "normal sinus rhythm." This term indicates that the heart is beating in a regular pattern with a typical rate, usually between 60 to 100 beats per minute, and that the electrical activity of the heart is functioning properly. In a normal sinus rhythm, the electrical impulses originate from the sinoatrial (SA) node, maintaining an appropriate and consistent rhythm which can be identified on an EKG.

The other terms listed refer to conditions that deviate from the normal electrical activity of the heart. "Arrhythmia" describes any irregular heartbeat, which could involve changes in rhythm or rate. "Bradycardia" refers to a slower than normal heart rate, typically identified as fewer than 60 beats per minute. In contrast, "tachycardia" indicates a faster than normal heart rate, commonly exceeding 100 beats per minute. Thus, while these terms indicate various types of abnormal heart function, "normal sinus rhythm" specifically confirms that an electrocardiogram is indeed normal.