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What is it and what is the Holter ECG The dynamic ECG according to Holter is a continuous 24-hour detection of the heartbeat that allows you to accurately assess the presence of arrhythmias, the type, frequency and recurrence of the same in specific 24-hour periods. It also allows you to evaluate the frequency of beats (maximum, minimum and average in the 24 hours of recording). As is the case with the 24-hour Holter ECG recording On the patient's chest that is properly shaped and cleansed, the nurse places electrodes on each of which is hooked a cable connected to the beat detector (Holter). Before being discharged, the patient is given a diary sheet on which he will have to report carefully the ongoing drug therapy, any symptoms he has encountered during the 24 hours of registration (e.g. pain, dizziness, headache, vomiting…), activities carried out. The device may not function properly if: – The patient's skin is not properly shaped and/or cleansed, – One or more electrodes are not properly connected to the patient, – One or more electrodes detach during the 24 hours of recording. In these cases, the recording hours will be less than the expected 24 hours or there will be recording artifacts that will reduce the quality of the ECG track. During the 24 hours of the recording the patient is urged not to perform intense physical activity that can make him sweat so as to disconnect the electrodes, not to take a shower and to wear a mesh over the electrodes so as not to accidentally remove them. Please respect the time indicated by the nurse for the return of the Holter device so as not to incur delays and inconvenience for other users. It is useful, as a comparison term, to bring an ECG into view if performed previously. What can I do when monitoring Holter? Holter monitoring does not require restrictions on routine therapy or activity (except for activities that may lead to excessive sweating). Indeed, it is important to live as active a life as possible during the Holter registration, and possibly carry out activities associated with the onset of the symptoms that are being studied. It is important to note any symptoms and changes of activity on the appropriate notebook (diary) in order to correlate the symptoms to any rhythm disorders. What are the limits and risks? Holter 24-hour MONITORING does not involve any kind of risk.