| HBE | His bundle electrogram |
|---|---|
| HIS | health information system; Health Interview Survey; histatin; histidine; hospital information system... |
| His | histidine |
| HPS | Hantavirus pulmonary syndrome; hematoxylin, phloxin, and saffron; Hermansky-Pudlak syndrome; high-pr... |
| ET | 1) Essential Thrombocytosis 2) Embryo Transfer |
| his bundle studies | <cardiology> This test studies the electrical activity of the bundle of HIS. The bundle of HIS is a group of electrical fibres in the heart that are responsible for transmitting the electrical impulses which generate a normal cardiac contraction. This test may be performed in cases of cardiac arrhythmias, to locate a specific area responsible for a conduction defect and to determine the need for cardiac pacemaker placement. The test involves the passage of a an electrode tipped catheter into the heart. This catheter is usually threaded through a neck, arm or chest vein. Measurements of the HIS bundle can then be performed while standard ECG leads are placed on the arms and legs. This test carries a small risk of bleeding, arrhythmias, embolism, heart attack and stroke. It is performed by a specially trained cardiologist. (27 Sep 1997) |
|---|---|
| His' copula | <anatomy> A median elevation in the floor of the embryonic pharynx caudal to the tuberculum impar. It merges laterally with the ventral part of the second and third branchial arches, and in later development is incorporated in the root of the tongue. Synonym: copula linguae, His' copula. (05 Mar 2000) |
| His' line | A line extending from the tip of the anterior nasal spine (acanthion) to the hindmost point on the posterior margin of the foramen magnum (opisthion), dividing the face into an upper and a lower, or dental part. (05 Mar 2000) |
| his operon | <molecular biology> An operon which governs the synthesis of the amino acid histidine out of ATP and phosphoribosyl pyrophosphate. The his operon was first observed in and described for the bacteria Salmonella typhinurium. (09 Oct 1997) |
| His' perivascular space | A tunnel-like extension of the subarachnoid space surrounding blood vessels that pass into the brain or spinal cord from the subarachnoid space; the lining of the channel is composed of pia and glial feet of astrocytes; a continuation of the space around capillaries and nerve cells probably does not occur. Synonym: His' perivascular space. (05 Mar 2000) |
| His' rule | The duration of pregnancy is calculated from the first day of the first omitted menstrual period; obsolete. (05 Mar 2000) |
| His' spindle | A fusiform dilation of the aorta immediately beyond the isthmus. Synonym: His' spindle. (05 Mar 2000) |
| His-Tawara system | The complex system of interlacing Purkinje fibres within the ventricular myocardium. See: conducting system of heart. (05 Mar 2000) |
| His, Wilhelm Jr | <person> German physician, 1863-1934. See: His' band, His' bundle, His bundle electrogram, His' spindle, Kent-His bundle, His-Tawara system. (05 Mar 2000) |
| His, Wilhelm Sr | <person> Swiss anatomist and embryologist in Germany, 1831-1904. See: His' copula, His' line, His' rule, His' perivascular space, isthmus of His. (05 Mar 2000) |
| disease, his | Named for the Swiss physician Wilhelm His, Jr. (who also described the bundle of His in the heart), this is a louse-borne disease first recognised in the trenches of World War I (and so called trench fever), again a major problem in the military in World War II, seen endemically in Mexico, N. Africa, E, Europe, and elsewhere. The cause, Rochalimaea quintana, is an unusual rickettsia that multiplies in the gut of the body louse. Transmission to people can occur by rubbing infected louse feces into abraded (scuffed) skin or conjunctiva (whites of the eyes). Onset of symptoms is sudden, with high fever, headache, back and leg pain and a fleeting rash. Recovery takes a month or more. Relapses are common. Also called Wolhynia fever, shin bone fever, quintan fever, five-day fever, Meuse fever, His-Werner disease, Werner-His disease. (12 Dec 1998) |
| disease, his-werner | Named for the Swiss physician Wilhelm His, Jr. (who also described the bundle of His in the heart) and the German physician Heinrich Werner (who did not describe Werner's syndrome). See Disease, His. (12 Dec 1998) |
| disease, werner-his | Named for the German physician Heinrich Werner (who did not describe Werner's syndrome) and the Swiss physician Wilhelm His, Jr. (who did describe the bundle of His in the heart), this is a louse-borne disease first recognised in the trenches of World War I (and so called trench fever), again a major problem in the military in World War II, seen endemically in Mexico, N. Africa, E, Europe, and elsewhere. The cause, Rochalimaea quintana, is an unusual rickettsia that multiplies in the gut of the body louse. Transmission to people can occur by rubbing infected louse feces into abraded (scuffed) skin or conjunctiva (whites of the eyes). Onset of symptoms is sudden, with high fever, headache, back and leg pain and a fleeting rash. Recovery takes a month or more. Relapses are common. Also called Wolhynia fever, shin bone fever, quintan fever, five-day fever, Meuse fever, His-Werner disease. (12 Dec 1998) |
| isthmus of His | A constriction in the embryonic neural tube delineating the mesencephalon from the rhombencephalon, the anterior portion of the rhombencephalon connecting with the mesencephalon. Synonym: isthmus rhombencephali, isthmus of His. (05 Mar 2000) |
| Kent-His bundle | The bundle of modified cardiac muscle fibres that begins at the atrioventricular node as the trunk of the atrioventricular bundle and passes through the right atrioventricular fibrous ring to the membranous part of the interventricular septum where the trunk divides into two branches, the right crus of the atrioventricular bundle and the left crus of the atrioventricular bundle; the two crura ramify in the subendocardium of their respective ventricles. Synonym: fasciculus atrioventricularis, atrioventricular band, Gaskell's bridge, His' band, His' bundle, bundle of His, Keith's bundle, Kent's bundle, Kent-His bundle, ventriculonector. (05 Mar 2000) |