Several studies have shown that ZIO®XT Patch has a higher diagnostic yield for arrhythmias than traditional 24-48 hour Holter monitoring and importantly can also efficiently characterise symptomatic patients without significant arrhythmia. The absence of an arrhythmia during syncope, palpitations or a triggered event does not by itself provide a definitive diagnosis but does allow the clinician to exclude an arrhythmia as a potential cause and is thus clinically useful. Over half of patients (53.4%) in one study did not have an arrhythmia despite a triggered event. This allows the clinician to potentially exclude an arrhythmia as an etiology of the patient's symptoms and potentially avoid further cardiac evaluation.