Arrhythmias

Abnormal heart rhythms; dysrhythmias. An arrhythmia is a problem with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that is too fast is called tachycardia. A heartbeat that...

Arteriosclerosis

Hardening of the arteries; types generally recognized are: atherosclerosis, Mönckeberg’s arteriosclerosis, and arteriolosclerosis. Atherosclerosis is a disease in which plaque builds up on the insides of the arteries. Arteries are blood vessels that carry...

Artery

A vessel that carries blood from the heart to the to other areas of the body. Arteries that carry blood to the brain are the carotid arteries—one on each side of the neck—that divide into internal and external carotid arteries. The internal carotid arteries supply...

Arthritis

Inflammation of a joint or a state characterized by inflammation of joints. Arthritis is caused by inflammation, of the tissue lining the joints. Some signs of inflammation include redness, heat, pain, and swelling. In some types of arthritis, the joints involved can...

Articulation

The adjustments and movements of speech organs involved in pronouncing a particular sound, taken as a whole. A neurological examination assesses motor and sensory skills, the functioning of one or more cranial nerves, articulation, hearing, vision, coordination and...

Artifact

Something artificial, a distortion that does not reflect normal anatomy or pathology, not usually found in the body. A structure or substance not normally present but produced by an external agent or action, such as a structure seen in a microscopic specimen after...

Aspiration

An accidental sucking in of food particles or fluids into the lungs. Can also mean removal of a sample of fluid and cells through a needle. Aspiration as a medical procedure is the removal of fluid or tissue through a needle, called a needle biopsy. Breathing in a...

Atherosclerosis

Atherosclerosis is the buildup of fat and other material inside the artery walls. Atherosclerosis is a disease in which plaque (plak) builds up on the insides of the arteries. Arteries are blood vessels that carry oxygen-rich blood to the heart and other parts of the...

Atrophic Vaginitis

Thinning of the lining of the vagina due to decreased production of estrogen. Atrophic vaginitis is an inflammation of the vagina due to thinning and shrinking tissues and a decrease in lubrication. Atrophic vaginitis is typically caused by a decrease in estrogen...