"This book is incredibly complete and easy-to-understand for anybody. I certainly recommend it for patients who want to know more about atrial fibrillation than what they will learn from doctors...."

Pierre Jaïs, M.D. Professor of Cardiology, Haut-Lévêque Hospital, Bordeaux, France

"Dear Steve, I saw a patient this morning with your book [in hand] and highlights throughout. She loves it and finds it very useful to help her in dealing with atrial fibrillation."

Dr. Wilber Su Cavanaugh Heart Center, Phoenix, AZ

"Your book [Beat Your A-Fib] is the quintessential most important guide not only for the individual experiencing atrial fibrillation and his family, but also for primary physicians, and cardiologists."

Jane-Alexandra Krehbiel, nurse, blogger and author "Rational Preparedness: A Primer to Preparedness"


"Steve Ryan's summaries of the Boston A-Fib Symposium are terrific. Steve has the ability to synthesize and communicate accurately in clear and simple terms the essence of complex subjects. This is an exceptional skill and a great service to patients with atrial fibrillation."

Dr. Jeremy Ruskin of Mass. General Hospital and Harvard Medical School

"I love your [A-fib.com] website, Patti and Steve! An excellent resource for anybody seeking credible science on atrial fibrillation plus compelling real-life stories from others living with A-Fib. Congratulations…"

Carolyn Thomas, blogger and heart attack survivor; MyHeartSisters.org

"Steve, your website was so helpful. Thank you! After two ablations I am now A-fib free. You are a great help to a lot of people, keep up the good work."

Terry Traver, former A-Fib patient

"If you want to do some research on AF go to A-Fib.com by Steve Ryan, this site was a big help to me, and helped me be free of AF."

Roy Salmon Patient, A-Fib Free; pacemakerclub.com, Sept. 2013

AF Symposium 2015

Pierre Jais MD

Pierre Jais MD

Persistent A-Fib: Insights into Finding Additional Drivers May Shorten Ablation Procedures with Fewer Lesions

By Steve s. Ryan, PhD, July 2015

Dr. Pierre Jais of the French Bordeaux/LIRYC group gave a presentation on “The Spectrum of Atrial Tachycardias Following Ablation of Drivers in Persistent AF.”

He described a study of the ablation of 50 persistent A-Fib patients using ECGI to map and ablate A-Fib signal drivers.

A-Fib was terminated in 79% of patients, with 10% returned to sinus rhythm and the remaining 69% in tachycardias (but with no A-Fib).

For those still in arrhythmia, ECGI was used to map, analyze and diagnose the locations of the arrhythmias signals, and additional ablation lesions were performed. Identified were 25 macro-reentry circuits and 14 focal/localized-reentry circuits.

The reentry circuits found by ECGI were:

• common atrial flutter in 14 patients
• perimitral flutter in 9 patients
• roof dependent flutter in 2 patients

Dr. Jais showed many slides and videos of how ECGI mapped and analyzed where these arrhythmias were coming from and how they were ablated.

Dr. Jais’ Conclusions

Dr. Jais stated that the study data revealed, “the focal/localized-reentry were adjacent to drivers at 0.9cm from the core of driver with low voltage (0.5 mV)”.

To clarify, this means that the drivers of the remaining arrhythmias were located very close (adjacent) to the drivers previously mapped by ECGI.

Therefore, when ECGI locates an area of rotors and drivers, it is highly likely this is where the source of additional arrhythmias will most likely be found. This insight reduces or eliminates the need (and time) to search other areas of the heart thereby shortening procedure length and decreasing the number of lesions needed.

Editor’s Comments:
ECGI mapping and ablating is changing our understanding of and our techniques for ablating persistent A-Fib. If a patient has continued arrhythmias after the initial ablation, ECGI often can re-map and identify where the remaining arrhythmias are coming from, usually very near previously identified driver locations. This is a valuable insight for doctors doing ablations.
For patients, it may mean a shorter procedure time with fewer burns needed to eliminate the sources of A-Fib signals.

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Return to 2015 AF Symposium: My In-depth Reports Written for Patients

Last updated: Thursday, August 6, 2015

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