What does a telemetry monitor help healthcare providers detect?

A telemetry monitor is essential in the clinical setting as it continuously tracks a patient's heart activity. It specifically helps healthcare providers detect abnormalities in heart rhythms, such as arrhythmias, which can indicate various cardiac conditions. This real-time monitoring allows for immediate intervention if a patient's heart shows signs of distress or irregularity.

While the other options relate to important aspects of patient care, they do not align with the primary function of a telemetry monitor. For example, patient allergies to medications are assessed through patient histories and charts, and pain levels are typically evaluated using patient-reported scales. Changes in blood pressure may be monitored using sphygmomanometers or automated devices specifically designed for that purpose, rather than through telemetry. Therefore, the focus of a telemetry monitor distinctly lies in the detection of heart rhythm abnormalities, making this the correct choice.