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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «H»:

  1. Hypotension, postural Hypotension, postural
    Hypotension, postural: A drop in blood pressure (hypotension) due to a change in body position (posture) when a person moves to a more vertical position: from sitting to standing or from lying down to sitting or standing. Postural hypotension is more common in older people. The change in position...
  2. Hypotensive Hypotensive
    Fat-Fighting Foods Take the Quiz: The Human Body Causes of Fatigue Slideshow Pictures ...
  3. Hypothalamic hamartoma Hypothalamic hamartoma
    Hypothalamic hamartoma: A benign tumor of the hypothalamus, the area of the brain that controls body temperature, hunger, and thirst. (In technical terms, the hypothalamus lies beneath a structure known as the thalamus and forms the floor of the third ventricle of the brain.) A small hypothalamic h...
  4. Hypothalamus Hypothalamus
    Hypothalamus: The area of the brain that controls body temperature, hunger, and thirst....
  5. Hypothermia Hypothermia
    Hypothermia: Abnormally low body temperature. The condition needs treatment at body temperatures of 35C (95 F) or below. And hypothermia becomes life threatening below body temperatures of 32.2 C (90 F). The signs and symptoms of hypothermia depend upon the body temperature. The major initial sig...
  6. Hypothyroidism Hypothyroidism
    Hypothyroid: Deficiency of thyroid hormone which is normally made by the thyroid gland which is located in the front of the neck:...
  7. Hypothyroidism, congenital Hypothyroidism, congenital
    Hypothyroidism, congenital: Underactivity of the thyroid gland at birth, resulting in growth retardation, developmental delay and other abnormal features. Can be due to deficiency of iodine in the mother's diet during pregnancy. The condition is detected today by newborn thyroid screening. Kn...
  8. Hypothyroidism, infantile Hypothyroidism, infantile
    Hypothyroidism, infantile: Hypothyroidism (subnormal activity of the thyroid gland) that starts after birth and is manifest by features including delays in growth and development and myxedema surfacing during infancy. Myxedema is a dry waxy type of swelling, often with swollen lips and nose...
  9. Hypotonia Hypotonia
    Hypotonia: Decreased tone of skeletal muscles. In a word, floppiness. Hypotonia is a common finding in cerebral palsy and other neuromuscular disorders. Untreated hypotonia can lead to hip dislocation and other problems. Treatment is via physical therapy. In some cases braces may be needed to pe...
  10. Hypotonic solution Hypotonic solution
    Hypotonic solution: A solution with a lower salt concentration than in normal cells of the body and the blood. As opposed to an isotonic solution or a hypertonic solution....
  11. Hypoventilation Hypoventilation
    Hypoventilation: The state in which a reduced amount of air enters the alveoli in the lungs, resulting in decreased levels of oxygen and increased levels of carbon dioxide in the blood. Hypoventilation can be due to breathing that is too shallow (hypopnea) or too slow (bradypnea) or to diminished lu...
  12. Hypovolemia Hypovolemia
    Hypovolemia: An abnormal decrease in blood volume or, strictly speaking, an abnormal decrease in the volume of blood plasma. From hypo- + volume + emia (blood)....
  13. Hypovolemic Hypovolemic
    Hypovolemic: Referring to hypovolemia, an abnormal decrease in blood volume. As, for example, hypovolemic shock....
  14. Hypovolemic shock Hypovolemic shock
    Hypovolemic shock: See shock. ...
  15. Hypoxemia Hypoxemia
    Hypoxemia: abnormally low levels of oxygen in the blood. Hypoxemia may be mild to severe and leads to shortness of breath. Low blood oxygen can result from a variety of conditions that affect either the ability of the heart to pump blood to the lungs to receive oxygen or the function of the lungs...