| heart murmurs | A sound generated by disturbed blood flow through the heart manifested as "turbulence". Turbulence is an irregular condition of motion caused by local vibrations of the wall of a vessel or heart chamber. Heart murmurs are usually detectable in ventricular outflow obstruction and in various types of heart valve disease and are differentiated from heart sounds, a physiological concept. (12 Dec 1998) |
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| heart muscle | <anatomy> Tissue specialised for contraction. See twitch muscle, catch muscle: Cardiac muscle (heart muscle) is a striated but involuntary muscle responsible for the pumping activity of the vertebrate heart. The individual muscle cells are joined through a junctional complex known as the intercalated disc and are not fused together into multinucleate structures as they are in skeletal muscle. Skeletal muscle is a rather non-specific term usually applied to the striated muscle of vertebrates that is under voluntary control. The muscle fibres are syncytial and contain myofibrils, tandem arrays of sarcomeres. Smooth muscle is muscle tissue in vertebrates made up from long tapering cells that may be anything from 20-500m long. Smooth muscle is generally involuntary and differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length. Smooth muscle cells are found particularly in blood vessel walls, surrounding the intestine (especially the gizzard in birds) and in the uterus. The contractile system and its control resemble those of motile tissue cells (for example fibroblasts, leucocytes) and antibodies against smooth muscle myosin will cross react with myosin from tissue cells, whereas antibodies against skeletal muscle myosin will not. See: dense bodies. (18 Nov 1997) |
| heart position | A description of the heart's assumed electrical habitus based upon the form of the QRS complexes in leads aVL, aVF, V1, and V6. Sometimes loosely (and inaccurately) used to describe the frontal plane electric axis. Synonym: heart position. (05 Mar 2000) |
| heart rate | The number of beats per minute. Normal resting heart rates are variable with age, sex, size and overall cardiovascular condition. Heart rate can be determined by taking the pulse. Normal heart rate for an average sized adult is in the range of 60-85 beats/minute. (27 Sep 1997) |
| heart rate, foetal | The heart rate of the foetus. The normal range at term is between 120 and 160 beats per minute. (12 Dec 1998) |
| heart rupture | Laceration or tearing of the walls of the heart, of the interatrial or interventricular septum, of the papillary muscles or chordae tendineae, or of any of the valves of the heart. Rupture may be due to a variety of pathological entities, however, the majority are secondary to myocardial infarction (heart rupture, post-infarction). (12 Dec 1998) |
| heart rupture, post-infarction | Rupture of the heart after myocardial infarction. (12 Dec 1998) |
| heart sac | <anatomy> A double membranous sac which envelops and protects the heart. The layer in contact with the heart is referred to as the visceral layer, the outer layer in contact with surrounding organs is the parietal pericardium. In between the two layers is the pericardial space. (27 Sep 1997) |
| heart septal defects | Defects in the cardiac septa, resulting in abnormal communications between the opposite chambers of the heart. (12 Dec 1998) |
| heart septal defects, atrial | Defects in the septum between the atria of the heart, due to failure of fusion between either the septum secundum or the septum primum and the endocardial cushions. (12 Dec 1998) |
| heart septal defects, ventricular | Congenital defects in the septum between the cardiac ventricles, most often due to failure of the bulbar septum to completely close the interventricular foramen. (12 Dec 1998) |
| heart septum | The thin membranous structure between the two heart atria or the thick muscular structure between the two heart ventricles. (12 Dec 1998) |
| heart sounds | The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of systole and is heard as a "lubb" sound; the second is produced by the closing of the aortic and pulmonary valves and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the atria; and the fourth is produced by atrial contraction and ventricular filling but is rarely audible in the normal heart. The physiological concept of heart sounds is differentiated from the pathological heart murmurs. (12 Dec 1998) |
| heart stroke | Impact of the apex of the heart against the wall of the chest. Synonym: angina pectoris. (05 Mar 2000) |
| heart tamponade | Interference with the venous return of blood to the heart due to an extensive accumulation of blood in the pericardium (pericardial effusion). Tamponade may occur as a complication of dissecting thoracic aneurysm, pericarditis, renal failure, acute myocardial infarction, hypothyroidism, autoimmune disease (for example lupus), chest trauma or a malignancy. Fluid in the pericardial sac is demonstrated by echocardiogram. Treatment involves the emergent removal of the fluid. This may be accomplished by a needle aspiration technique or emergency surgery (pericardial window). (27 Sep 1997) |
Synonyms : Administration, Health Services
Synonyms : Health Services for Aged, Health Services for the Elderly, Health Services, Geriatric, Geriatric Health Service, Health Service, Geriatric, Service, Geriatric Health, Services, Geriatric Health
Synonyms : Health Services Overutilization, Misuse, Health Services, Health Services Abuse, Health Services Abuses, Health Services Misuses, Misuses, Health Services, Overutilization, Health Services
Synonyms : Health Services Needs, Needs, Needs and Demand, Health Services, Target Population, Health Services Need, Need, Health Services, Needs, Health Services, Population, Target, Populations, Target, Target Populations
Synonyms : Action Research, Health Services Evaluation, Healthcare Research, Research, Medical Care, Evaluation, Health Services, Evaluations, Health Services, Health Services Evaluations, Research, Action, Research, Health Care, Research, Healthcare
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| hexad |
six: the cardinal number that is the sum of five and one
Ãâó: wordnet.princeton.edu/perl/webwn
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| hemorrhage |
shed blood: lose blood from one's body bleeding: flow of blood from a ruptured blood vessels
Ãâó: wordnet.princeton.edu/perl/webwn
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| heart massage |
cardiac massage: an emergency procedure that employs rhythmic compression of the heart (either through the chest wall or, during surgery, directly to the heart) in an attempt to maintain circulation during cardiac arrest
Ãâó: wordnet.princeton.edu/perl/webwn
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| heat of fusion |
heat absorbed by a unit mass of a solid at its melting point in order to convert the solid into a liquid at the same temperature; "the heat of fusion is equal to the heat of solidification"
Ãâó: wordnet.princeton.edu/perl/webwn
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| head louse |
infests the head and body of humans
Ãâó: wordnet.princeton.edu/perl/webwn
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| HE | an executioner who beheads the condemned person |
|---|---|
| HE | presiding officer of a school |
| HE | the position of headmaster |
| HE | a woman headmaster |
| HE | the position of headmistress |
| HE | electro-acoustic transducer for converting electric signals into sounds |
| HE | a protective helmet for the head |
| HE | the band that is the part of a bridle that fits around a horse's head |
| HE | the front bowling pin in the triangular arrangement of ten pins |
| HE | the military installation from which a commander performs the functions of command |
| HE | the office that serves as the administrative center of an enterprise |
| HE | a military unit consisting of a commander and the headquarters staff |
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