Identification and Spectrum Analysis of the Atrial Electrical Activity for Differential Diagnostics of the Atrial Fibrillation

Alexander G. Mrochek, Alexander V. Frolov, Tatiana G. Vaikhanskaya, Alexander P. Voitovich, Margarita V. Voitikova, Olga P. Melnikova

¹Republican Scientific Practical Centre of Cardiology, Minsk, Belarus ²Institute of Physics, Minsk, Belarus

*Corresponding author: Prof. Alexander V. Frolov, ScD, Head of Medical Information Technology Laboratory, Republican Scientific Practical Center, 110 R. Luxemburg str, Minsk 220036, Belarus. Tel: 375-017-286-19-56. Fax: 375-017-256-05-23. E-mail:


Background: The algorithm for precise differential diagnostics of atrial fibrillation and atrial flutter was recently developed.

Materials and methods: 19 patients with atrial fibrillation and several digital ECGs from database.

Results: The algorithm developed is based on atrial ECG extraction by the blind source separation method and its spectral analysis. The number of spectral peaks in the 2-9 Hz range is calculated. Atrial flutter refers to one peak while atrial fibrillation refers to more than one peak.

Conclusions: This method was successfully tested in patients with atrial fibrillation or atrial flutter on several digital ECGs from database. The algorithm was 100% reliable.

atrial fibrillation, atrial flutter, electrocardiogram, spectrum analysis.

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Int J Biomed. 2011; 1(3):124-127. © 2011 International Medical Research and Development Corporation. All rights reserved.