The Holter is a diagnostic tool to detect the syncope of unknown origin.

• Syncope: transient loss of consciousness that occurs with spontaneous recovery and without sequelae due to cerebral hypo-perfusion.
• Cardiac syncope has its origin in an arrhythmia as primary cause, this can be caused by a decrease in pulsations Bradycardia (Sinus Node Dysfunction, atrial conduction disorder ventricular or an increase in these tachycardia (supraventricular, idiopathic ventricular … ).
• Sincope has a high incidence in the population, according to various studies we can affirm that between 15% and 35% of the population has a syncopal episode during their life.
• In relation to mortality, several studies have been carried out where it was concluded that of the patients who went to the emergency room with suspicion of syncope, the risk of death in this population was 4.4%.
• Syncope is characterized by the difficulty of detecting and recording the moment in which it happens, which is why the relevance of having a continuous monitoring of the electrical activity of the heart, since it supposes an increase in the probability of detecting an event.
• A subcutaneous Holter continuously monitors the patient’s heart rhythm and thanks to a specific algorithm makes AF detection (Atrial Fibrillation), it can also store symptoms manually thanks to a push button that carries the patient, this will activate it just after recover and the Holter will record the minutes before the episode.
• The current Holter is compatible with Magnetic Resonance (MR) and its size is very small, allowing its subcutaneous insertion with a tool similar to a syringe. These devices have a battery that allows monitoring the heart rate for 3 years in a row, they also include a monitor that connects wirelessly with the Holter and is able to send all the information to a platform where the specialist can evaluate it.
• There are clinical guidelines for the diagnosis and management of syncope with the aim of standardizing patient management and electrocardiographic monitoring. In addition, it is recommended to evaluate bradycardia before placing a heart pacemaker.
• In recent years the monitoring of heart devices has changed a lot thanks to remote monitoring systems without having to attend a consultation.