Can thyroid disease cause atrial fibrillation?

Thyroid disease is a definite cause of atrial fibrillation. Doctors should check their patient's thyroid when they have atrial fibrillation.

Thyroid abnormalities directly affect the heart, so thyroid disease can cause atrial fibrillation.

Dr. Kalyanam Shivkumar, MD
Cardiologist (Heart Specialist)

It is possible for thyroid disease to cause atrial fibrillation (AFib), but not in most cases. If you are diagnosed with atrial fibrillation, your doctor will probably check your thyroid to make sure it’s functioning properly.

Dr. Indrajit Choudhuri, MD
Cardiologist (Heart Specialist)

Patients with both an overactive and underactive thyroid can have atrial fibrillation, an abnormal heart rhythm, but it is hard to identify whether the thyroid disease is the actual cause of the atrial fibrillation, unless there are no other possible contributors.

Dr. Douglas E. Severance, MD
Family Practitioner

An overactive thyroid (hyperthyroidism) can lead to atrial fibrillation. Too much thyroid hormone can impair the ability of cells in your heart to transmit electrical impulses well. One in 10 people with an overactive thyroid experience atrial fibrillation. In many cases, bringing the thyroid problem under control can control the atrial fibrillation, too.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.