What device is used to monitor heart rhythms continuously?

The Holter monitor is specifically designed for continuous monitoring of heart rhythms over an extended period, typically 24 to 48 hours. This portable electrocardiogram (ECG) device records the electrical activity of the heart, allowing for the detection of dysrhythmias that may not be captured during a standard ECG which is performed in a clinical setting. The data collected by the Holter monitor can provide valuable insights into the patient's heart health during their daily activities, making it an essential tool for diagnosing conditions such as arrhythmias.

In contrast, a stethoscope is primarily used for auscultating heart sounds but does not provide continuous electrical activity monitoring. A sphygmomanometer measures blood pressure, which does not directly relate to heart rhythm assessment. An echocardiogram machine offers imaging of the heart's structure and function but is not intended for continuous rhythm monitoring. Thus, the Holter monitor is the appropriate choice for continuous observation of heart rhythms.