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How does the thyroid affect heart failure?

An overactive thyroid gland causes the body to work at a fast pace. Over time, the heart can have trouble keeping up. Once the thyroid hormone is down to normal levels, the heart is likely to pump at a normal speed.

The thyroid gland produces hormones that help the muscles in the body function properly. An overactive thyroid gland produces too much hormone. As a result, the heart beats too rapidly for it to eject the proper volume of blood with each heartbeat. An underactive thyroid gland does not produce enough hormones and the heart muscle, along with all of the muscles in the body, become weak. Both an overactive and underactive thyroid can result in heart failure. Blood tests determine if the thyroid is functioning properly.

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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.