Atrial Fibrillation (AFib)

  • 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: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

Quick GuideAtrial Fibrillation: Heart Symptoms, Diagnosis & Treatment for AFib

Atrial Fibrillation: Heart Symptoms, Diagnosis & Treatment for AFib

Heart monitors and other tests

Holter monitor

If episodes of AFib occur intermittently, a standard EKG performed at the time of a visit to the doctor's office may not show AFib. Therefore, a Holter monitor, a continuous recording of the heart's rhythm for 24 hours, often is used to diagnose intermittent episodes of AFib.

Patient-activated event recorder

If the episodes of atrial fibrillation are infrequent, a 24-hour Holter recording may not capture these sporadic episodes. In this situation, the patient can wear a patient-activated event recorder for 1 to 4 weeks. The patient presses a button to start the recording when he or she senses the onset of irregular heartbeats or symptoms possibly caused by AFib. The doctor then analyzes the recordings at a later date.

Other tests

High blood pressure and signs of heart failure can be ascertained (determined) during a physical examination of the patient. Blood tests are performed to detect abnormalities in blood oxygen and carbon dioxide levels, electrolytes, and thyroid hormone levels. Chest X-rays reveal enlargement of the heart, heart failure, and other diseases of the lung. Exercise treadmill testing (a continuous recording of the EKG during exercise) is a useful screening study for detecting severe coronary artery disease. Continue Reading

Reviewed on 7/13/2016
References
Medically reviewed by: Robert J. Bryg, MD; Board Certified Internal Medicine with subspecialty in Cardiovascular Disease.

REFERENCES:

UpToDate. Patient information: Atrial fibrillation (Beyond the Basics).

Wann, Samuel L., et al. "2011 ACCF/AHA/HRS focused update on the management of patients with atrial fibrillation (Updating the 2006 Guideline): a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines." Journal of the American College of Cardiology 57.2 (2011): 223-242.

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