Significance of upright twaves in precordial lead v1 as to its correlation with coronary artery disease and in particular the circumflex coronary artery
Joint Authors
Matta, Anthony
Kharma, Alexandre
Kharma, Joyce
Rachoin, Rachoin
Source
Issue
Vol. 65, Issue 4 (31 Dec. 2017), pp.201-204, 4 p.
Publisher
Publication Date
2017-12-31
Country of Publication
Lebanon
No. of Pages
4
Main Subjects
Abstract EN
The T wave in precordial lead V1 is normally inverted in normal adults.
The significance of an upright T wave in precordial lead V1 as to the presence of coronary artery disease is controversial and not well studied in the literature.
Our purpose is to show the relation between an upright T wave in V1 and the presence of coronary artery disease and specifically that of the circumflex.
Material and methods: We studied, retrospectively, 624 consecutive patients referred for cardiac catheterization with normal electrocardiograms excluding patients with acute coronary syndromes, bundle branch blocks, left ventricular hypertrophy, intraventricular conduction delays, pacemakers, ST-T changes, significant valvular heart disease, cardiomyopathies and metabolic disorders.
Significant coronary artery stenosis was considered when the stenosis was > 70%; normal or nonsignificant coronary artery stenosis was considered when the coronary stenosis was < 70% (all patients had < 50% coronary stenosis).
The ECG’s and coronary arteriographies were reviewed.
The 2x2 chi-square was used for statistical analysis.
Results : Out of the 624 patients, 380 (60.89%) had normal coronary arteries out of which only 17 (4.47%) had an upright T wave in V1, 244 (39.11%) had significant coronary artery disease out of which 137 (56.14%) had positive T wave in V1, significantly more than the normal population with a p value < 0.0001.
A total of 142 patients had significant circumflex stenosis out of whom 128 (90.1%) had a positive T wave in V1; a total of 482 patients had no significant circumflex stenosis, out of whom only 26 (5.39%) had a positive T wave in V1, the difference was highly significant with a p value < 0.00001 as to the presence of a T upright in V1 in patients with significant circumflex stenosis.
This significance was maintained when excluding the patients with diabetis mellitus.
Conclusion: An upright T wave in V1 is significantly related to the presence of significant coronary artery stenosis and specifically the circumflex coronary artery
Abstract FRE
Objectif : L’onde T dans la dérivation précordiale V1 est normalement négative chez les adultes.
L’importance d’une onde T positive dans cette dérivation quant à la la présence de maladie coronarienne est controversée et peu étudiée dans la littérature.
Notre objectif est de montrer la relation entre une onde T positive en V1 et la présence de maladie coronarienne et en particulier celle de l’artère circonflexe (Cx).
Méthodes : Nous avons étudié rétrospectivement 624 malades consécutifs référés pour coronarographie avec des électrocardiogrammes (ECG) normaux avec les exclusions suivantes: blocs de branches, hypertrophie ventriculaire gauche, problèmes de conductions intraventriculaires, stimulateurs automatiques, maladies valvulaires, cardiomyopathies et troubles métaboliques et électrolytiques.
Les sténoses coronariennes étaient considérées significatives si > 70%, et non significatives si < 70% (toutes les sténoses non significatives étaient < 50% chez les patients inclus).
Les ECGs et les coronarographies étaient revus.
Le 2x2 chisquare a été utilisé pour l’analyse statistique.
Résultats: Des 624 patients, 380 (60,89%) avaient des coronaires sans sténoses significatives, dont 17 (4,47%) avaient une onde T positive en V1, 244 avaient des sténoses significatives des coronaires dont 137 (56,14%) avec une onde T positive en V1, une différence significative (p < 0,0001) les comparant aux patients sans sténoses significatives.
Cent quarantedeux patients avaient des sténoses significatives de la Cx dont 128 (90,1%) avec l’onde T positive en V1.
Seulement 26 (5,39%) des 482 malades sans sténoses significatives de la Cx avaient l’onde T positive en V1, une différence très significative avec un p < 0,00001 en faveur de la présence d’une onde T positive en V1 et sténose de la Cx.
Cette relation fut maintenue quand les patients diabétiques ont été exclus.
Conclusion : Une onde T positive en V1 est significativement reliée à la présence de sténoses coronariennes significatives et spécifiquement celle de la Cx.
American Psychological Association (APA)
Kharma, Joyce& Matta, Anthony& Rachoin, Rachoin& Kharma, Alexandre. 2017. Significance of upright twaves in precordial lead v1 as to its correlation with coronary artery disease and in particular the circumflex coronary artery. Journal Médical Libanais،Vol. 65, no. 4, pp.201-204.
https://search.emarefa.net/detail/BIM-812651
Modern Language Association (MLA)
Kharma, Joyce…[et al.]. Significance of upright twaves in precordial lead v1 as to its correlation with coronary artery disease and in particular the circumflex coronary artery. Journal Médical Libanais Vol. 65, no. 4 (2017), pp.201-204.
https://search.emarefa.net/detail/BIM-812651
American Medical Association (AMA)
Kharma, Joyce& Matta, Anthony& Rachoin, Rachoin& Kharma, Alexandre. Significance of upright twaves in precordial lead v1 as to its correlation with coronary artery disease and in particular the circumflex coronary artery. Journal Médical Libanais. 2017. Vol. 65, no. 4, pp.201-204.
https://search.emarefa.net/detail/BIM-812651
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 204
Record ID
BIM-812651
