Introduction: A single-lead electrocardiogram (EKG) is routinely recorded with electroencephalogram (EEG). This study investigates the frequency and types of EKG abnormalities during routine EEG.Methods: All EEGs (20–60 min) over one year were retrospectively analyzed. blinded cardiologist interpreted recordings. An epileptologist evaluated EEGs. Demographic data, underlying comorbidities, indi...