Which technology helps in the continuous monitoring of ECG signals?

Digital Holter monitors are specifically designed for the continuous monitoring of ECG signals over extended periods, typically ranging from 24 to 48 hours, and sometimes even longer. These devices record the heart's electrical activity continuously, allowing for comprehensive analysis and detection of arrhythmias, heart rate variability, and other cardiac anomalies that might not be captured during a standard, brief ECG test.

Unlike standard electrocardiograms, which provide a snapshot of the heart's electrical activity at a single point in time, Holter monitors allow for the collection of data during daily activities and sleep, capturing a more complete picture of the patient's cardiac function throughout their normal routine. This continuous monitoring capability is critical for diagnosing intermittent cardiac issues that may not present during a typical office visit.

On the other hand, digital thermometers, while useful for monitoring body temperature, and analog pulse oximeters, which measure blood oxygen saturation, do not provide any information regarding the heart's electrical activity. Thus, the focus on continuous ECG signal monitoring distinctly identifies the Digital Holter monitor as the correct answer in this context.