Which pulse indicates a potential atrial fibrillation?

An irregular pulse is indicative of potential atrial fibrillation because this condition is characterized by an abnormal heart rhythm that leads to erratic electrical signals in the atria. As a result, the heart beats in an uncoordinated manner, causing variations in the intervals between heartbeats. This irregularity in the pulse can often be detected during a physical examination, where the practitioner may notice that the pulse does not have a consistent rhythm, which is a hallmark sign of atrial fibrillation.

In contrast, a regular pulse reflects a typical sinus rhythm where heartbeats occur at consistent intervals. A rapid pulse might signal various conditions, including fever or anxiety, but does not specifically indicate atrial fibrillation on its own. Similarly, a weak pulse could occur in a number of situations, such as dehydration or shock, but it is not a specific sign of atrial fibrillation. Thus, the presence of an irregular pulse is a key indicator that prompts further investigation for potential atrial fibrillation.