How Serious Is Atrial Fibrillation?

  • Medical Author:
    Daniel Lee Kulick, MD, FACC, FSCAI

    Dr. Kulick received his undergraduate and medical degrees from the University of Southern California, School of Medicine. He performed his residency in internal medicine at the Harbor-University of California Los Angeles Medical Center and a fellowship in the section of cardiology at the Los Angeles County-University of Southern California Medical Center. He is board certified in Internal Medicine and Cardiology.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Ask the experts

How serious was Vice President Dick Cheney's latest heart problem, atrial fibrillation?

Doctor's response

Vice President Cheney has been in the news because of the development of an irregular heart rate known as atrial fibrillation (also known as Afib). He has previously had heart problems with a weakened heart muscle due to prior heart attacks, prior coronary surgery (including angioplasty, coronary artery bypass surgery, and coronary artery stenting), and an implantation of a pacemaker/defibrillator. The development of atrial fibrillation in this setting is not uncommon, however, it is common for an individual to develop atrial fibrillation without the above conditions.

Atrial fibrillation is a condition where the upper heart chambers (atria) do not contract normally. Instead, they contract rapidly in a disorganized fashion, leading to an irregular and rapid heart rhythm. This rhythm is associated with an increased risk of blood clots forming in the upper heart chambers, which could result in stroke. This can be prevented with the use of the blood thinner warfarin (Coumadin), and if the levels of this drug are appropriate, the risk of stroke is minimal. In many instances, specific medicines and/or electrical procedures (for example, electrical cardioversion, which is the treatment Mr. Cheney received) may be used to treat atrial fibrillation. With good medical care, Mr. Cheney should be in no significant danger, and should easily be able to carry out the duties of his office.

Medically reviewed by John A. Daller, MD; American Board of Surgery with subspecialty certification in surgical critical care


"Criteria for the diagnosis of acute myocardial infarction"

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Reviewed on 8/14/2017