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Medical Dictionary Terms Beginning with H
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Hardy-Weinberg law
Hardy-Weinberg law: Basic concept in population genetics discovered independently in 1908 by the great English mathematician G(odfrey) H(arold) Hardy and Wilhelm Weinberg, a physician in Germany. The Hardy- Weinberg law is a cornerstone of clinicamore detail info...
HAVRIX
HAVRIX: A vaccine against hepatitis A made of killed hepatitis A virus to stimulate the body’s immune system to produce antibodies against the hepatitis A virus.more detail info...
Hay fever
Hay fever:Also allergic rhinitis. A seasonal allergy to airborne particles characterized by runny/itchy nose and eyes, sneezing, itchy throat, excess mucus, and nasal congestion. It is a misnomer because it is not caused by hay and it does not pmore detail info...
Hb (hemoglobin)
Hb (hemoglobin): Hb is the standard abbreviation for hemoglobin, the oxygen-carrying protein pigment in the blood, specifically in the red blood cells. In the very common laboratory test for hemoglobin (Hb), it is measured as total hemoglobin and the remore detail info...
HBIG
HBIG: Hepatitis B immune globulin, which contains antibodies to hepatits B virus and offers prompt but short lived protection.more detail info...
HCFA
HCFA: The Health Care Finance Administration, the part of the U.S. Department of Health and Human Services (HHS) that is responsible for administering Medicare and Medicaid. See: Medicare. Also see: Medicaid.more detail info...
hCG
hCG: Human chorionic gonadotropin, a human hormone produced by the fetal part of the placenta that stimulates the gonads. The abbreviation can also be written entirely in capital (upper case) letters as &HCG&. For more on this hormone in keymore detail info...
HCM (hypertrophic cardiomyopathy)
HCM (hypertrophic cardiomyopathy): A heart defect characterized by increased thickness (hypertrophy) of the wall of the left ventricle, the largest of the four chambers of the heart. HCM can surface any time in life. It may, in a worst-case scenarmore detail info...
Hct (hematocrit)
Hct (hematocrit): Abbreviation for hematocrit. The hematocrit is the proportion, by volume, of the blood that consists of red blood cells. The hematocrit (hct) is expressed as a percentage. For example, an hematocrit of 25% means that there are 2more detail info...
HDL (high-density lipoprotein)
teinHDL(high-density lipoprotein):Lipoproteins, which are combinations of lipids (fats) and proteins, are the form in which lipids are transported in the blood. The high-density lipoproteins transport cholesterol from the tissues of the body tomore detail info...
HDL cholesterol
HDL cholesterol: Lipoproteins, which are combinations of lipids (fats) and proteins, are the form in which lipids are transported in the blood. The high-density lipoproteins transport cholesterol from the tissues of the body to the liver so it cmore detail info...
Head lice infestation
Head lice infestation: The condition of being infested with lice is called pediculosis. Head lice (Pediculus humanus capitis) are parasitic insects found on the heads of people. Having head lice is very common. Anyone can get head lice who comes in closmore detail info...
Headache, cluster
Headache, cluster: A distinctive syndrome of headaches, also known as migrainous neuralgia. The common pattern of cluster headache is termed ôepisodicö and is characterized by 1-3 short attacks of pain each day around the eyes, clustered over amore detail info...
Health
Health: It may seem ridiculous to define &health& when we all know what it is. Or do we? The definition of health by the World Health Organization/Organisation Mondiale de la SantΘ (WHO/OMS) is as follows: &Health is a state of completemore detail info...
Health and Human Services
Health and Human Services: See HHS.more detail info...
Health Care Finance Administration
Health Care Finance Administration: See: HCFA.more detail info...
Health care proxy
Health care proxy: A health care proxy is one form of advance medical directive. Advance medical directives pertain to treatment preferences and the designation of a surrogate decision-maker in the event that a person should become unable to makemore detail info...
Health outcomes research
Health outcomes research: The measurement of the value of a particular course of therapy. Health outcomes research is based on the principle that every clinical intervention produces a change in the health status of a patient and that change can be meamore detail info...
Heart
Heart: The heart is a muscle which pumps blood it receives from veins into arteries throughout the body. The heart is composed of specialized muscle called &cardiac muscle.& (see muscle). The heart, veins and arteries make up the circulatorymore detail info...
Heart attack
Heart attack: A coronary artery occlusion or myocardial infarction (MI).more detail info...