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How are blood tests used to diagnose atrial fibrillation?

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These can point your doctor to what might be causing your atrial fibrillation. Blood tests may check for infection, thyroid, and kidney problems, signs of a heart attack, and more.

SOURCES:

National Heart Lung and Blood Institute: "How is Atrial Fibrillation Diagnosed?"

American Heart Association: "Common Tests for Arrhythmia."

Northwestern Memorial Hospital: "Atrial Fibrillation Express Test."

Heart Rhythm Society: "Diagnosing Atrial Fibrillation (AFib)."

Medscape: "Atrial Fibrillation Workup: Lab Studies."

Reviewed by Brunilda Nazario on February 19, 2021

SOURCES:

National Heart Lung and Blood Institute: "How is Atrial Fibrillation Diagnosed?"

American Heart Association: "Common Tests for Arrhythmia."

Northwestern Memorial Hospital: "Atrial Fibrillation Express Test."

Heart Rhythm Society: "Diagnosing Atrial Fibrillation (AFib)."

Medscape: "Atrial Fibrillation Workup: Lab Studies."

Reviewed by Brunilda Nazario on February 19, 2021

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What is an AFib attack?

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