Objectives: To present the clinical experience with a new extended (for 15 days), wireless, and satellite cardiac monitoring system in a group of patients with suspicion of cardiac arrhythmia.Method: The study included a cohort of 100 patients seen in the Cardiovascular Electrophysiology Unit of a reference hospital.They were suspected of having a cardiac arrhythmia, with no electrocardiographic diagnosis of the cause, despite previous examinations.They were subjected to SEEQ-type (Medtronic) external cardiac monitoring for 15 days, with the outcomes recorded.Results: Of the total of 100 subjects studied, 51% were male, and the median age was 60 years (range: 5 -91 years).The main symptoms were palpitation, and the most prevalent comorbidity was arterial hypertension (47%).Almost all (98%) of them had a previous Holter study, and 46% had two studies, which were inconclusive in explaining the symptoms.The SEEQ monitoring recorded a significant electrocardiographic abnormality in 22% of the patients.A pacemaker implant was the treatment most applied and atrial fibrillation was the most frequent arrhythmia in 50% of the positive findings.There was a higher and significant percentage of positive diagnoses in males.Conclusions: External, satellite, wireless cardiac monitoring extended for 15 days, is a novel tool that can increase the probability of documenting a clinically significant electrocardiographic abnormality in those patients who suffer recurrent cardiovascular symptoms.