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

Which Comorbid Risks Do You Have That Make Your A-Fib More Severe? And What To Do

Published August 11, 2026

Most A-Fib patients have at least one concurrent medical condition, i.e., comorbidity, that makes Atrial Fibrillation symptoms more severe and makes treating A-Fib more difficult with increased risk of complications. They can also affect the longevity of a treatment such as a catheter ablation.

Concurrent Medical Conditions

Concurrent conditions, or comorbidities, are risk factors that can interfere with the biological mechanisms or processes (pathogenesis) of your A-Fib. The leading concurrent conditions affecting Atrial Fibrillation patients are:

• Obstructive Sleep Apnea
• Diabetes
• Hypertension (high blood pressure)
• Heat Failure
• Air pollution
• Respiratory Disease
• Chronic Kidney Disease
• Mental health disorders

Comorbidities and the Impact on Your Atrial Fibrillation

Obstructive Sleep Apnea (OSA): At least 43% of patients with Atrial Fibrillation also suffer from Obstructive Sleep Apnea. …->Continue reading about each of the concurrent conditions on our list and the risks for Atrial Fibrillations and learn what to do…->Go to read my full article.