Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «H»:
Hyperbaric: Pertaining to gas pressures greater than 1 atmosphere* of pressure. Also pertaining to solutions that are more dense than the medium to which they are added. The term "hyperbaric" is derived from Greek roots: "hyper-" meaning high, beyond, excessive, above normal + "baros" meaning weight...
Hyperbilirubinemia: An elevated level of the pigment bilirubin in
the blood. A sufficient elevation will produce jaundice. Some degree of hyperbilirubinemia
is very common in babies right after birth, especially premies. ...
Hyperbilirubinemia type I
Hyperbilirubinemia type I: Better known as Gilbert's disease, a common but harmless genetic condition in which a liver enzyme essential to the disposal of bilirubin (the chemical that results from the normal breakdown of hemoglobin from red blood
cells) is abnormal. (The errant enzyme is called UDP...
Hyperbilirubinemia, neonatal: Elevation of the bilirubin level in the blood of the newborn, which results in yellowish
staining of the skin and whites of the newborn's eyes
(sclerae) by pigment of bile (bilirubin). In newborn
babies a degree of jaundice is normal. It is due to the
Hypercalcemia: A higher-than-normal level of calcium in
the blood. This can cause a number of nonspecific symptoms, including loss of appetite,
nausea, thirst, fatigue, muscle weakness, restlessness, and confusion. Excessive intake of
calcium may cause muscle weakness and constipation, affect the co...
Hypercalciuria: Excess calcium in the urine....
Hypercapnia: More than the normal level of
carbon dioxide in the blood. Hypercapnia is as opposed to hypocapnia and acapnia. The origin of the suffix "-capnia" is curious. It comes from the Greek "kapnos" referring to carbon dioxide which is a principal part of smoke....
Hypercarbia: More than the normal level of
carbon dioxide in the blood. Hypercarbia is the opposite of hypocarbia....
Hyperchloremia: Elevated blood levels of chloride.
Chloride is the major anion found in the fluid outside of cells
and in blood. An anion is the negatively charged part of certain
substances such as table salt (NaCl) when dissolved in liquid. Sea
water has almost the same concentration of chlorid...
Hypercholesterolemia: High blood cholesterol. This can be sporadic (occurring with no family history) or familial. Hypercholesterolemia is one form of hyperlipidemia.
Familial hypercholesterolemia is the most common inherited type of hyperlipidemia (high fat or lipid levels in blood). It predisposes...
Hypercoagulability, estrogen-associated: Hypercoagulability (a supranormal tendency for blood to clot) occurs as an occasional but serious side effect of estrogen therapy.
The blood clots in this situation are dose-related, that is, they occur more frequently with higher doses of estrogen.
Hypercoagulable state: A hypercoagulable state is the
medical term for a condition in which there is an abnormally
increased tendency toward blood clotting (coagulation).
There are numerous hypercoagulable states. Each has different causes
and each increases a person's chances of developing b...
Hyperconscious: More conscious than usual. Extremely aware. People became hyperconscious of Parkinson disease after the actor Michael J. Fox developed it at a relatively young age....
Hyperekplexia: A genetic disorder also known as hyperexplexia in which babies have an exaggerated startle reflex (reaction).
This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of hypertonia (stiffness), exaggerated startle res...
Hyperemesis gravidarum: Excessive vomiting in early
pregnancy. Hyperemesis gravidarum, by definition, leads to the loss
of 5% or more of the body weight of the woman.
Hyperemesis gravidarum affects about one in every 300 pregnant
women. It is more common in young women, in first pregnancies and ...