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. Author manuscript; available in PMC: 2011 Jun 30.
Published in final edited form as: Heart Rhythm. 2010 Oct 16;8(2):244–253. doi: 10.1016/j.hrthm.2010.10.020

Figure 3.

Figure 3

Complex fractionated electrogram (CFAE) site with distinct monophasic action potentials (MAPs) After atrial fibrillation Acceleration. A: Quasi-periodic fractionation in the right atrial appendage (bold horizontal lines) punctuate periods of regular activation on pentarray electrograms. MAPs remain distinct throughout. Notably, MAP alternans was observed prior to CFAE (narrow horizontal bar). B: Abrupt atrial fibrillation cycle length (CL) shortening precedes CFAE. Pentarray splines B–E show CFAE as CL shortens from 200 ms to shorter CL. CFAE attenuated when CL lengthened. C: Fluoroscopy. D: Spectral dominant frequency is broad.