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Ronald Berger, M.D., Ph.D.

Ronald Berger, M.D., Ph.D., is professor of medicine and biomedical engineering at Johns Hopkins University. Dr. Berger is also director of the electrophysiology fellowship program and co-director of the electrophysiology service at The Johns Hopkins Hospital. He serves on the editorial boards of three major journals in the cardiovascular field, has authored more than 250 articles and book chapters, and holds more than 30 patents on methods and devices used in electrophysiology diagnosis and treatment. Dr. Berger and his colleagues perform approximately 3,500 electrophysiology procedures and 500 atrial fibrillation ablation procedures each year.

Latest by Ronald Berger, M.D., Ph.D.

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What is Atrial Fibrillation?

Learn more about the basics of atrial fibrillation and if you might be at risk.

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Tests for Atrial Fibrillation

Learn about the different tests that can be used to identify atrial fibrillation.

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Risk Factors

Atrial Fibrillation: Symptoms and Causes

Not everyone who develops atrial fibrillation will experience symptoms, but for those who do, they can range from mild to severe.


Atrial Fibrillation and Alcohol

Although some alcohol consumption may help protect against heart disease, heavy alcohol intake increases the risk of atrial fibrillation in men.

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9 Tests for Atrial Fibrillation

Symptoms of atrial fibrillation vary. It may be detected as an incidental finding during a physical examination or test that has been ordered for some other reason.

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Risk Factors

Excess Pounds Raise Atrial Fibrillation Risk

Your risk of developing atrial fibrillation, or a fast, irregular, and chaotic heartbeat, may rise in tandem with your weight. Here’s why