Syncope is defined as transient loss of consciousness. The incidence of syncope is high and the risk of occurrence in life is 42% in the general population. Cardiac syncope has a much higher mortality rate than syncope of non-cardiac causes, and the main mechanism is arrhythmia. The diagnostic evaluation consists of a careful interview, physical examination with orthostatic blood pressure measurement and electrocardiogram (ECG). However, the cause of syncope might by problematic to diagnose. The implantable loop recorder (ILR) can be a useful diagnostic device. We present the case of a 64-year-old female patient referred to our Department for the diagnosis of syncope.