Dictionary

idiopathic torsion dystonia See dystonia, idiopathic torsion.

idiopathic sclerosing cholangitis See primary sclerosing cholangitis.

idiopathic hypertrophic subaortic stenosis Narrowing of the left ventricle of the heart just below the aortic valve through which blood must pass on its way up into the aorta. The narrowing cuts the flow of blood and is due to hypertrophic cardiomyopathy (HCM), a genetic disorder of the heart. HCM is the leading cause of…

idiopathic Of unknown cause. For example, idiopathic pulmonary fibrosis is scarring of the lung tissue without a known cause.

idiocy, amaurotic familial See Tay-Sachs disease.

IDDM Insulin-dependent diabetes mellitus. See diabetes, type 1.

ICU psychosis A disorder in which patients in an intensive care unit (ICU) or a similar hospital setting experience anxiety, become paranoid, hear voices, see things that are not there, become severely disoriented in time and place, become very agitated, or even become violent. ICU psychosis is a form of acute brain failure (delirium). Organic…

ICU Intensive care unit. The intensive care unit is a designated area of a hospital facility that is dedicated to the care of patients who are seriously ill.

icterus See jaundice.

ICSI Intracytoplasmic sperm injection.

ICSH interstitial-cell-stimulating hormone (ICSH). See luteinizing hormone.

ichthyosis-keratitis-deafness syndrome See keratitis-ichthyosis-deafness syndrome.