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NT-proBNP levels in participants with new AF on index-ECG vs. 2 weeks screening. The 29 participants diagnosed with new AF on the index-ECG had a median NT-proBNP level of 1308 ng/L (IQR 663–2180 ng/L) and those with new AF during the following 2 weeks 305 ng/L (IQR 199–522 ng/L). AF, atrial fibrillation; ECG, electrocardiogram; IQR, interquartile range; NT-proBNP, N-terminal B-type natriuretic peptide.
