What is Heart Block?

A disorder of the heart caused by a blockage of the nerve impulses to the heart that regulate heartbeat; may lead to dizziness, fainting, or stroke. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is HDL?

See High-density lipoprotein. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Hay Fever?

The common name for allergic rhinitis. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Hashimoto’s Disease?

A disease in which the body’s immune system attacks cells of the thyroid gland, resulting in a decrease in thyroid hormones. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Hamstring Muscle?

A muscle located at the back of the thigh that bends the leg at the knee and moves the leg backward. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Hammer Toe?

An abnormality in the tendons of the toe that causes the toe to be flexed at all times. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Hallucination?

A perception that occurs when there is actually nothing there to cause it (such as hearing voices when there are none). Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Halitosis?

The clinical term for bad breath; commonly caused by poor oral hygiene or eating certain foods; if persistent it can be a sign of illness. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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