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. Author manuscript; available in PMC: 2015 Jan 13.
Published in final edited form as: Circ Arrhythm Electrophysiol. 2013 Feb 26;6(2):294–301. doi: 10.1161/CIRCEP.112.000167

Figure 2.

Figure 2

Recorded electrograms (EGMs) and ECGs and their dominant frequency (DF) distribution in a sample patient with a left-to-right DF gradient. A, Three examples of EGMs recorded at different atrial sites and their corresponding power spectra. B, Selected surface body surface potential mapping leads: surface left (SL), surface posterior (SP) and surface right (SR), and their corresponding power spectra. C, Intracardiac DF map. Black arrow points to the left atrial (LA) region with highest DF at the left superior pulmonary vein (LSPV). D, DF map on the torso surface with superimposed locations of electrodes from (B). CS indicates coronary sinus; LIPV, left inferior pulmonary vein; RA, right atrium; RSPV, right superior pulmonary vein; and SVC, Superior vena cava.