Health > Encyclopedia of Medicine

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  • Ayurvedic Medicine

    Healthline — Ayurvedic medicine is a system of healing that originated in ancient India. In Sanskrit, ayur means life or living, and veda means knowledge, so Ayurveda has been defined as the "knowledge of living" or the "science of longevity." ...More…

  • Aviation Medicine

    Healthline — Also known as aerospace medicine, flight medicine, or space medicine, aviation medicine is a medical specialty that focuses on the physical and psychological conditions associated with flying and space travel. Since flying airplanes and ...More…

  • Autopsy

    Healthline — Most autopsies advance medical knowledge and provide evidence for legal action. Medically, autopsies determine the exact cause and circumstances of death, discover the pathway of a disease, and provide valuable information to be used in the care ...More…

  • Autoimmune Disorders

    Healthline — Autoimmune disorders are conditions in which a person's immune system attacks the body's own cells, causing tissue destruction. Autoimmunity is accepted as the cause of a wide range of disorders, and it is suspected to be responsible for many ...More…

  • Autism

    Healthline — Autism is a severe disorder of brain function marked by problems with social contact, intelligence and language, together with ritualistic or compulsive behavior and bizarre responses to the environment. Autism is a lifelong disorder that ...More…

  • Auditory Integration Training

    Healthline — Auditory integration training (AIT), is one specific type of music/auditory therapy based upon the work of French otolaryngologists Dr. Alfred Tomatis and Dr. Guy Berard. The premise upon which most auditory integration programs are based is that ...More…

  • Audiometry

    Healthline — Audiometry is the testing of a person's ability to hear various sound frequencies. The test is performed with the use of electronic equipment called an audiometer. This testing is usually administered by a trained technician called an ...More…

  • Attention-Deficit/Hyperactivity Disorder (ADHD)

    Healthline — Attention-deficit/hyperactivity disorder (ADHD) is a developmental disorder characterized by distractibility, hyperactivity, impulsive behaviors, and the inability to remain focused on tasks or activities. ADHD, also known as hyperkinetic ...More…

  • Atrial Septal Defect

    Healthline — An atrial septal defect (ASD) is an abnormal opening in the muscular wall separating the left and right upper chambers (atria) of the heart. During normal development of the fetal heart, there is an opening in the wall (septum) separating the ...More…

  • Atrial Fibrillation and Flutter

    Healthline — Atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles, or lower chambers of the heart. In atrial fibrillation, the atria "quiver" chaotically and the .. ...More…

  • Atrial Ectopic Beats

    Healthline — Atrial ectopic beats (AEB) refers to a contraction of the upper heart chamber which occurs before it would be expected. Atrial ectopic beats are also known as premature atrial beats, premature atrial complex (PAC), or atrial extrasystole. An AEB ...More…

  • Atopic Dermatitis

    Healthline — Eczema is a general term used to describe a variety of conditions that cause an itchy, inflamed skin rash. Atopic dermatitis, a form of eczema, is a non-contagious disorder characterized by chronically inflamed skin and sometimes intolerable itching.More…


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