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Titolo:
Diurnal variation of RT dispersion in patients with and without coronary artery disease
Autore:
Yetkin, E; Senen, K; Ileri, M; Atak, R; Topaloglu, S; Ergun, K; Yanik, A; Tandogan, I; Cehreli, S; Duru, E; Demirkan, D;
Indirizzi:
Turkiye Yuksek Ihtisas Hosp, Dept Cardiol, Ankara, Turkey Turkiye Yuksek Ihtisas Hosp Ankara Turkey Dept Cardiol, Ankara, Turkey
Titolo Testata:
ANGIOLOGY
fascicolo: 5, volume: 52, anno: 2001,
pagine: 311 - 316
SICI:
0003-3197(200105)52:5<311:DVORDI>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE MYOCARDIAL-INFARCTION; QT INTERVAL DISPERSION; SUDDEN CARDIAC DEATH; CIRCADIAN VARIATION; VENTRICULAR ARRHYTHMIA; HEART-FAILURE; ISCHEMIA; LONG; PREDICTOR; MECHANISM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Yetkin, E Hosdere Caddesi 8-20,Ayranci, Ankara, Turkey Hosdere Caddesi 8-20,Ayranci Ankara Turkey ci, Ankara, Turkey
Citazione:
E. Yetkin et al., "Diurnal variation of RT dispersion in patients with and without coronary artery disease", ANGIOLOGY, 52(5), 2001, pp. 311-316

Abstract

QT dispersion defined as interlead QT variability in a 12-lead electrocardiogram was proposed by Day and associates as a simple method to evaluate the repolarization heterogenicity of the ventricular myocardium. The frequency of onset of myocardial infarction and sudden death has been reported to have a circadian variation, with a peak incidence in the early morning hours. The authors investigated whether there is diurnal variation of QT interval and QT interval dispersion in healthy subjects and in patients with coronary artery disease. The study population consisted of two groups. Group I consisted of 62 subjects without coronary artery disease and group II consisted of 82 patients with coronary artery disease. Twelve-lead ECG was recorded for each patient in the morning (between 7 AM and 8 AM), afternoon (between 3 PM and 5 PM) and at night (between 11 PM and 1 AM), On the day after performance of coronary angiography. QTc dispersion was significantly higher in patients with coronary artery disease than in healthy subjects in the morning hours and afternoon (p < 0.001). Although the differences were muchprominent in group I than group II, both QTc dispersion of morning and afternoon were significantly greater than those at night. There were no statistically significant differences between group I and group II at nighttime with respect to maximum QTc, minimum QTc intervals, and QTc dispersion (p > 0.05). In conclusion, QT dispersion shows diurnal variation with an increase in the morning hours in both patients with coronary artery disease and subjects without coronary artery disease. The mechanism of diurnal variation of QT dispersion in patients with coronary artery disease is quite different from that of healthy subjects.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 14:24:26