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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: J Cardiovasc Electrophysiol. 2012 Jan 9;23(5):489–496. doi: 10.1111/j.1540-8167.2011.02248.x

Figure 2.

Figure 2

A: Ablation with balloon occluded coronary sinus (shown in the fluoroscopic image) results in rapid-onset conduction delay (on RFp: from 72 milliseconds to 146 milliseconds) at the mitral isthmus after 4 minutes and 25 seconds of endocardial RF application. The arrow denotes the moment of split in the potential, which was followed by sudden prolongation of delay. B: Schema and electrograms demonstrating bidirectional block across the mitral isthmus during differential CS pacing, and pacing from the LAA at the end of the procedure. CS = coronary sinus; LAA = left atrial appendage; LPV = left pulmonary veins = RF = radiofrequency.