heart rate variability!

heart rate variability

Comprehensive Analysis

1) "Heart" -- As to heart rate variability 1heart Pronunciation: 'härt Function: noun Etymology: Middle English hert, from Old English heorte; akin to Old High German herza heart, Latin cord-, cor, Greek kardia 1 a : a hollow muscular organ of vertebrate animals that by its rhythmic contraction acts as a force pump maintaining the circulation of the blood b : a structure in an invertebrate animal functionally analogous to the vertebrate heart c : BREAST, BOSOM d : something resembling a heart in shape; specifically : a stylized representation of a heart 2 a : a playing card marked with a stylized figure of a red heart b plural : the suit comprising cards marked with hearts c plural but singular or plural in construction : a game in which the object is to avoid taking tricks containing hearts 3 a : PERSONALITY, DISPOSITION <a cold heart> b obsolete : INTELLECT 4 : the emotional or moral as distinguished from the intellectual nature: as a : generous disposition : COMPASSION <a leader with heart> b : LOVE, AFFECTIONS <won her heart> c : COURAGE, ARDOR <never lost heart> 5 : one's innermost character, feelings, or inclinations <knew it in his heart> <a man after my own heart> 6 a : the central or innermost part : CENTER b : the essential or most vital part of something c : the younger central compact Editing of this article by unregistered or newly registered users is currently disabled. Such users may discuss changes, request unprotection, log in, or create an account. The heart and lungs, from an older edition of Gray's Anatomy. The heart is a pear shaped, muscular organ in vertebrates, responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods[1] The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδία, kardia, for "heart." The heart is composed of cardiac muscle, an involuntary muscle tissue which is found only within this organ.[2] 1 Early development 2 Structure 3 First aid 4 Food use 5 As a symbol 6 References 7 See also 8 External links At 21 days after conception, the human heart rate begins beating at 75-80 beats per minute and accelerates linearly for the first month of beating. The human embryonic heart begins beating approximately 21 days after conception, or five weeks after the last normal menstrual period (LMP), which is the date normally used to date pregnancy. The human heart begins beating at a rate near the mother’s, about 75-80 beats per minute (bpm). The embryonic heart rate (EHR) then accelerates ..." 2) "Rate" -- As to heart rate variability 1rate Pronunciation: 'rAt Function: verb Inflected Form(s): rat�ed; rat�ing Etymology: Middle English transitive verb 1 : to rebuke angrily or violently 2 obsolete : to drive away by scolding intransitive verb : to voice angry reprimands Pronunciation Symbols See also: rates (tax), naval rate, naval rating, or reaction rate. A rate is a special kind of ratio, indicating a relationship between two measurements with different units, such as miles to gallons or cents to pounds. For example, suppose one spends 9 dollars on 2 pounds of candy. The rate $9 / 2 pounds compares the money spent to the number of pounds of candy.(or money) The division operator, when dealing with rates, is sometimes expressed as "per". Also, if the units are expressed without abbreviation, the top unit is usually plural while the bottom is singular. For example, (5 meters)/(3 seconds) may be written as 5/3 meters per second. Often rate is a synonym of rhythm or frequency, such as heart rate or sample rate. A unit rate is a rate that is simplified so it has a denominator of 1. This type of rate is frequently used when referring to statistics. The civics membership in the U.S. House of Representatives is based on a population in the preceding census. In 1990, the population of the United States was about 248,000,000. There are 435 members in the house. On average, how many people are represented by each member of the house? Write the rate that compares the population to the number of members of the house. Then divide both the numerator and the denominator by 435. (248,000,000 people)/(435 members) ≈ (570,000 people)/(1 member). This says that each representative represents about 570,000 people. Listing of major bank current interest rates. Derivative Reaction rate Vocal rate ..." 3) "Variability" -- As to heart rate variability 1var�i�able Pronunciation: 'ver-E-&-b&l Function: adjective Etymology: Middle English, from Anglo-French, from Latin variabilis, from variare to vary 1 a : able or apt to vary : subject to variation or changes <variable winds> <variable costs> b : FICKLE, INCONSTANT 2 : characterized by variations 3 : having the characteristics of a variable 4 : not true to type : ABERRANT -- used of a biological group or character - var�i�abil�i�ty /"ver-E-&-'bi-l&-tE/ noun - var�i�able�ness /'ver-E-&-b&l-n&s/ noun - var�i�ably /-blE/ adverb Pronunciation Symbols The term "variability", "the state or characteristic of being variable", may be applied to many different subjects: Solar variation Human variability Genetic variability Heart rate variability Spatial variability Statistical variability Climate variability ..." 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