Concordance (medicine)
Concordance ( lat . Concordare "match") is the agreement of measurements and assessments. Concordance analysis, a statistical process, uses the methods of Kendall's concordance coefficient , Cohen's Kappa, and Krippendorff's Alpha .
cardiology
As a special term, concordance is used in cardiology when comparing the shape of the curve in an electrocardiogram (EKG). The normal ECG curve is characterized by a specific pattern with positive and negative curve progressions ( QRS complex ) (upwards or downwards).
If, for example, in the context of a ventricular tachycardia, all QRS complexes in the leads V 1 -V 6 have a completely negative or positive deflection, this is referred to as concordance. An important differential diagnosis is a special form of tachycardia in WPW syndrome (so-called antidromic tachycardia with a left-sided path).
The term is also used for changes to the ST segments . If, for example, there is an increase or decrease in the same direction as the main deflection of the chamber complex , then one also speaks of concordance (in the case of disparate behavior of "disconcordance").
In addition, the concordance in genetics denotes the occurrence of a trait or disease in both twins (monozygotic or dizygotic).
Individual evidence
- ↑ Robert Kwiecien, Annette Kopp-Schneider, Maria Blettner: Concordance Analysis: Part 16 of the series of scientific publications for evaluation . In: Deutsches Ärzteblatt . tape 108 , July 29, 2011, p. 515–521 , doi : 10.3238 / arztebl.2011.0515 ( online [accessed January 31, 2014]).
- ^ Sattler: Case book cardiology and angiology . Thieme Verlag, 2007, ISBN 3-13-141811-7 , p. 167, ( books.google.de ).
- ↑ A. Ohly: EKG finally understandable: Everything you need to know . Urban & Fischer Verlag, 2008, ISBN 3-437-41412-7 , p. 29, ( books.google.de ).