Doctors & patients are saying about 'A-Fib.com'...

"A-Fib.com is a great web site for patients, that is unequaled by anything else out there."

Dr. Douglas L. Packer, MD, FHRS, Mayo Clinic, Rochester, MN

"Jill and I put you and your work in our prayers every night. What you do to help people through this [A-Fib] process is really incredible."

Jill and Steve Douglas, East Troy, WI

“I really appreciate all the information on your website as it allows me to be a better informed patient and to know what questions to ask my EP.

Faye Spencer, Boise, ID, April 2017

“I think your site has helped a lot of patients.”

Dr. Hugh G. Calkins, MD Johns Hopkins,
Baltimore, MD

Doctors & patients are saying about 'Beat Your A-Fib'...

"If I had [your book] 10 years ago, it would have saved me 8 years of hell.”

Roy Salmon, Patient, A-Fib Free,
Adelaide, Australia

"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

"...masterful. You managed to combine an encyclopedic compilation of information with the simplicity of presentation that enhances the delivery of the information to the reader. This is not an easy thing to do, but you have been very, very successful at it."

Ira David Levin, heart patient,
Rome, Italy

"Within the pages of Beat Your A-Fib, Dr. Steve Ryan, PhD, provides a comprehensive guide for persons seeking to find a cure for their Atrial Fibrillation."

Walter Kerwin, MD, Cedars-Sinai Medical Center, Los Angeles, CA

2025 AF Symposium: First Human Trial of Nanosecond Pulse Field Ablation

Published May 13, 2025

Dr. Vivek Reddy

As an energy source, pulsed field ablation (PFA) has generated tremendous excitement as an A-Fib treatment, largely due to its safety benefits.

Dr. Vivek Reddy, Director of Electrophysiology for the Mount Sinai Health System, reports on a trial of a variant energy pulse for Pulse Field Ablation, instead of microsecond pulses it uses nanosecond pulses.

Microsecond vs Nanosecond Pulses

Dr. Reddy pointed out that all current Pulsed Field Ablation (PFA) systems employ microsecond pulses, but sometimes you run up against a thermal limit to what you can deliver.

But nanosecond PFA has less thermal effect because the PFA pulses are shorter and larger in amplitude. This allows the Nanosecond PFA system to deliver more energy and create deeper lesions in a shorter time.

The first-in-human trial of the Pulse Biosciences Nanosecond PFA system is designed to assess its feasibility, safety and… <-Read about the trial and what more energy and deep lesions means for A-Fib patients.->