Holter and loop/event recorders monitor for which of the following events?

• A. Sleep quality
• B. Cardiac events
• C. Blood sugar levels
• D. Lung capacity

Answer: (B)

Holter and loop/event recorders track the heart’s electrical activity over an extended period to catch irregular rhythms and related cardiac events. They continuously record ECG data during daily activities, allowing clinicians to correlate symptoms like palpitations, dizziness, or chest discomfort with specific rhythm changes. This helps diagnose arrhythmias, pauses, tachy/brady events, or ischemic episodes. They are not designed to measure sleep quality, blood glucose, or lung capacity, which are assessed with other tests.