Review
Copyright ©The Author(s) 2023.
World J Cardiol. Apr 26, 2023; 15(4): 119-141
Published online Apr 26, 2023. doi: 10.4330/wjc.v15.i4.119
Table 2 Main advantages, limitations, and indications of the most commonly used devices for electrocardiogram cardiac monitoring in patients with syncope

Advantages
Disadvantages
Main indications
24-hr holterContinuous recording: 12 leads with good correlation with surface ECG; low economic cost per studyDiscomfort for the patient; artifacts; maximum recording of 24-48 h (low diagnostic yield); high economic cost per diagnosisVery frequent (daily) symptoms; in-hospital monitoring (if ECG-telemetry not available)
Skin patchesContinuous recording of 7-14 d; good tolerability for patientsSingle-use and greater economic cost; only one lead1; low diagnostic yieldFrequent (weekly) symptoms
External loop recordersLoop recording (includes beginning and end of arrhythmic event); monitoring for 4 wk; low economic cost per studyPatient discomfort; requires education from healthcare professional on how to correctly place the electrodes; relatively low diagnostic yieldFrequent (weekly-monthly) symptoms
Implantable loop recordersLoop recording; up to 3-yr monitoring (good diagnostic yield); patient does not have to do anything; remote monitoringInvasiveness and associated complications (infection, bleeding, etc.); individual economic cost; single leadInfrequent symptoms; most useful in syncope