Fleming Christine P. author Columbia University. Electrical Engineering Wang Hui author Quan Kara J. author Rollins Andrew M. author Columbia University. Electrical Engineering originator text Articles 2010 English Radio-frequency ablation (rfa) is the standard of care for the treatment of cardiac arrhythmias; however, there are no direct measures of the successful delivery of ablation lesions. Optical coherence tomography (OCT) imaging has the potential to provide real-time monitoring of cardiac rfa therapy, visualizing lesion formation and assessing tissue contact in the presence of blood. A rfa-compatible forward-imaging conical scanning probe is prototyped to meet this need. The forward-imaging probe provides circular scanning, with a 2-mm scan diameter and 30-μm spot size. During the application of rf energy, dynamics are recorded at 20framespersecond with a 40-kHz A-line rate. Real-time monitoring of cardiac rfa lesion formation and imaging in the presence of blood is demonstrated ex vivo in a swine left ventricle with a forward, flexible, circular scanning OCT catheter. Medical imaging and radiology 15 3 030516-1 030516-3 2010-05 http://dx.doi.org/10.1117/1.3459134 http://hdl.handle.net/10022/AC:P:15234 NNC NNC 2012-11-08 14:10:09 -0500 2012-11-08 14:23:10 -0500 9236 eng