AMSA Advanced Nursing 2 Practice Test

The indication that an electrical impulse has originated at the SA node and is following the normal sequence is referred to as normal sinus rhythm. This term specifically describes a heart rhythm that originates from the sinoatrial node, which is the natural pacemaker of the heart. In normal sinus rhythm, the heart rate typically ranges from 60 to 100 beats per minute, and the electrical impulses are conducted in the proper sequence through the atria and ventricles, ensuring coordinated heart contractions.

In this rhythm, the P waves are present and precede each QRS complex on the electrocardiogram (ECG), demonstrating that the impulses are initiated in the SA node. This orderly conduction is crucial for maintaining an effective cardiac output and normal physiological function.

Arrhythmia, bradycardia, and tachycardia refer to abnormal heart rhythms. Arrhythmia is a general term for any irregular heartbeat that does not originate from the SA node, meaning it does not represent a normal sinus rhythm. Bradycardia indicates a slower-than-normal heart rate, while tachycardia signifies a faster-than-normal heart rate. Neither of these conditions suggests that impulses are being generated from the SA node in the standard manner associated with a normal rhythm. Therefore, normal