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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «H»:

  1. Hernia, Velpeau Hernia, Velpeau
    Hernia, Velpeau: A Velpeau hernia is a femoral hernia in front of the femoral blood vessels in the groin. (A hernia ("rupture") is a protrusion of tissue through the wall of a cavity in which it is normally contained.) The Velpeau hernia is named for the French surgeon of the same name (1795-1867)...
  2. Herniated disc Herniated disc
    Herniated disc: Rupturing of the tissue that separates the vertebral bones of the spinal column. The center of the disc, which is called the nucleus, is soft, springy and receives the shock of standing, walking, running, etc. The outer ring of the disc, which is called the annulus (Latin for ring),...
  3. Herniation Herniation
    Herniation: Abnormal protrusion of tissue through an opening. For example, a intervertebral disk (one situated between the vertebral bodies) can protrude and impinge on a nerve root. ...
  4. Herniorrhaphy Herniorrhaphy
    Herniorrhaphy: The surgical repair of a hernia. Herniorrhaphy may be done under local or general anesthesia using a conventional incision or a laparoscope. The term "herniorrhaphy" comes from hernio-, referring to a hernia + the Greek rhaphe, a seam = putting a seam (or suture) in a hernia....
  5. Heroin Heroin
    Heroin: Semisynthetic drug derived from morphine. Discovered in 1874, it was introduced commercially in 1898 by the Bayer company in Germany. The name heroin was coined from the German heroisch meaning heroic, strong. Heroin is stronger (more potent) than morphine....
  6. Heroin addiction Heroin addiction
    Heroin addiction: Physical addiction to heroin, often with concurrent use of other opiates when heroin itself is not available. Treatment is by withdrawal, either gradual or sudden. Medication may be used to ease the physical effects of withdrawal, which include cramping, nausea, and intense c...
  7. Herpangina Herpangina
    Herpangina: A viral illness in which small, painful ulcers and sores are found inside the mouth. It is accompanied by sore throat and fever. Herpangina is most common in children aged 3-10 but can occur at any age. Herpangina is usually caused by Coxsackie group A viruses. The illness typically re...
  8. Herpes Herpes
    Herpes: A family of viruses. Herpes also refers to infection with one of the human herpesviruses, especially herpes simplex types 1 and 2. Herpes simplex type 1, also known as human herpesvirus 1 (HHV-1), causes cold sores and fever blisters in the mouth and around it. Here is a depiction of a typic...
  9. Herpes simplex type 1 Herpes simplex type 1
    Herpes simplex type 1: A herpes virus that causes cold sores and fever blisters in and around the mouth. Here is a depiction of a typical fever blister caused by herpes simplex 1: In rare cases, as when someone's immune system is severely compromised, this virus can cause infection of the brain (e...
  10. Herpes simplex type 2 Herpes simplex type 2
    Herpes simplex type 2: A herpes virus that causes genital herpes, which is characterized by sores in the genital area. Genital herpes is a sexually transmitted disease (STD). This virus, like herpes simplex type 1, can also cause infection of the brain (encephalitis) if the immune system is severe...
  11. Herpes zoster Herpes zoster
    Herpes zoster: Also called shingles, zona, and zoster. The culprit is the varicella-zoster virus. Primary infection with this virus causes chickenpox (varicella). At this time the virus infects nerves (namely, the dorsal root ganglia) where it remains latent (lies low) for years. It can then be rea...
  12. Herpes, febrile Herpes, febrile
    Herpes, febrile: A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and crusting over. The favorite locations are on the lips (the labia), chin or cheeks and in the nostrils. Less frequented sites are the gums or roof of the mouth (the palate). ...
  13. Herpes, genital Herpes, genital
    Herpes, genital: See: Genital herpes....
  14. Herpes, labial Herpes, labial
    Herpes, labial: A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and crusting over. The favorite locations are on the lips (the labia), chin or cheeks and in the nostrils. Less frequented sites are the gums or roof of the mouth (the palate). ...
  15. Herpesvirus Herpesvirus
    Herpesvirus: One of a family of double-stranded DNA viruses that cause common infections in humans. These include: herpes, CMV, chickenpox, shingles, mono, measles, and Kaposi sarcoma. The herpesviruses may live latently in a person for years or even decades without causing symptoms and then be act...