Effects of Atrial Pacing on QT Dispersion in Patients with Coronary Artery Disease Without Angina Pectoris and ST Segment Depression

• Published in: Angiology 2001-06, Vol.52 (6), p.393-398
• Main Authors: Demir, Ahmet Duran, Senen, Kubilay, Balbay, Yücel, Soylu, Mustafa, Tikiz, Hakan, Korkmaz, Sule
• Format: Article
• Language: English
• Subjects: Adult; Aged; Angina Pectoris - complications; Biological and medical sciences; Cardiac pacing; Cardiac Pacing, Artificial - methods; Cardiology. Vascular system; Care and treatment; Coronary Angiography; Coronary Disease - complications; Coronary Disease - diagnosis; Coronary Disease - therapy; Coronary heart disease; Electrocardiography; Female; Follow-Up Studies; Heart; Humans; Long QT Syndrome - diagnosis; Long QT Syndrome - etiology; Male; Medical sciences; Middle Aged; Physiological aspects; Probability; Reference Values; Severity of Illness Index; Treatment Outcome
• ISSN: 0003-3197; 1940-1574
• DOI: 10.1177/000331970105200604

The aim of this study was to investigate QT dispersion during atrial pacing in patients with coronary artery disease (CAD) without clinical ischemia, such as angina pectoris and ST segment depression. Thirteen patients with normal coronary arteries and 42 patients with CAD (12 with single-vessel, 16 with two-vessel and 14 with three-vessel disease) having no angina pectoris or ST segment depression during atrial pacing with maximum rate of 120/minute were enrolled in the study. Twelve-lead surface ECGs were recorded at 100 mm/second paper speed before pacing, at maximum pacing rate, and during the recovery period for measurement of QT interval parameters. Corrected QTd (QTcd) increased from 43.4 ±8.1 to 49.3 ±9.5 ms (p