Which of the following symptoms might indicate dysrhythmia?

An irregular radial pulse is a significant indicator of potential dysrhythmia, which refers to any disturbance in the normal rhythm of the heartbeat. When the pulse is irregular, it can suggest that the heart is not beating in a consistent rhythm, potentially pointing to underlying cardiac issues such as arrhythmias or other forms of dysrhythmia. The radial pulse reflects the heart's rhythm, and an irregularity may warrant further assessment, such as an electrocardiogram (ECG), to determine the specific nature and cause of the abnormal heart activity.

In contrast, constant low blood pressure, frequent urination, and increased appetite are not direct indicators of dysrhythmia. Low blood pressure can be related to various conditions, but it does not necessarily imply a problem with heart rhythm. Similarly, frequent urination may be associated with other health issues, such as diabetes or urinary tract infections, while increased appetite is generally not connected to heart rhythm disturbances. Therefore, the irregularity in the radial pulse is the most relevant and specific symptom when assessing for dysrhythmia.