Effects of isolated coronary artery ectasia on electrocardiographic parameters reflecting ventricular heterogeneity
Journal of Electrocardiology, cilt.40, sa.2, ss.203-206, 2007 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 2
- Basım Tarihi: 2007
- Doi Numarası: 10.1016/j.jelectrocard.2005.10.009
- Dergi Adı: Journal of Electrocardiology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.203-206
- Anahtar Kelimeler: coronary artery ectasia, QT dispersion, ischemia
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Isolated coronary ectatic but otherwise normal epicardial coronary arteries are an infrequent angiographic finding. We sought to determine whether coronary artery ectasia (CAE) may alter QT-interval duration and dispersion. The study population consisted of 24 patients with isolated CAE and otherwise normal epicardial coronary arteries (group 1) and sex- and age-matched subjects with atypical chest pain and otherwise normal coronary flow (group 2). Both groups underwent a routine standard 12-lead surface electrocardiogram recorded at 50 mm/s during rest. QT dispersion (QTd), corrected QT (QTc), and corrected QT dispersion (QTcd) were calculated. Distribution of sex, age, body mass index, and cardiac risk factors were similar in the 2 groups. Mean heart rate was similar in the 2 groups (74 ± 10 vs 70 ± 7, P > .05). In group 1, QTd, QTcd, and QTc were significantly higher than those of group 2 (QTd, 40 ± 17 vs 29 ± 10 milliseconds [P < .05]; QTcd, 43 ± 19 vs 30 ± 10 milliseconds [P < .05]; QTc, 410 ± 21 vs 397 ± 19 milliseconds [P < .05]). In conclusion, CAE was found to be associated with prolonged QT interval and increased QTd. Microvascular dysfunction and/or ischemia may be responsible mechanisms. © 2007 Elsevier Inc. All rights reserved.