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Univariate and multivariate analysis adjusted by ethnicities was performed. Results: White patients exhibited higher prevalence of atrial fibrillation (14.7%) than black patients (8.0%, P = 0.01) whereas Hispanics presented higher prevalence of paced rhythm (14.3% in Hispanics vs. 6.5% in whites and 5.2% in blacks, P http://www.selleckchem.com/products/a-1331852.html vs. 8.8% in whites and 5.8% in blacks, P = 0.002) and increased frequency of abnormal QT intervals (76.7% in Hispanics) than whites (59.6%) and blacks (69%) patients (P http://www.selleck.cn/products/PLX-4720.html ECG (EEP-ECG) is often used in the diagnosis of Brugada syndrome (BrS). However, the specificity of this has only been studied in smaller studies in Asian populations. We aimed to study this in a larger European population. Methods: Two different populations consisting of healthy subjects were used. A total of 340 subjects were included, 80% were men, the median age was 43 year (interquartile range: 31�C51) and all were of European ethnicity. Results: No type 1 ECG patterns were identified but 16 (4.7%) subjects with a type 2 ECG and 32 (9.4%) subjects with a type 3 ECG were identified in any lead placement. In total 43 (13%) subjects had any BrS ECG pattern in any lead placement. The specificity was 100% (one-sided 97.5% CI: 99%) for the use of EEP-ECG to uncover type 1 pattern. For type 2 pattern http://www.selleckchem.com/products/avelestat-azd9668.html the specificity was 95% (95% CI: 92�C97%) and for type 3 pattern 91% (95% CI: 88�C94%). Conclusions: Elevated electrode placement ECG in the diagnosis of BrS seems to have a very high specificity with regards to the finding of a type 1 ECG pattern in a European population; conversely a finding of a type 2 or 3 pattern is of a significantly lower specificity and should perhaps be disregarded. ""The presence of notched R or S waves without accompanying typical bundle branch blocks, or the existence of an additional wave like RSR�� pattern in the original QRS complex (with a duration of