Akademik Veri Yönetim Sistemi
Policlinico - Sezione Medica, cilt.108, sa.3, ss.89-94, 2001 (Scopus)
Background: Contrast agents due to their osmolality, sodium content, and calcium-chelating properties produce a variety of adverse hemodynamic and electrophysiologic effects. To evaluate the effect of left ventriculography on left and right ventricular repolarization parameters. Methods: Our study group consisted of 22 consecutive male patients (mean age 55±10 years) with stable angina pectoris according to clinical, ECG, and stress test results. In all patients left ventriculography preceded the selective injections of coronary arteries. All ECGs were recorded from left (V1-V6) and right (RV3-RV6) precordial leads immediately before and after left ventriculography. Each of the ECG parameters obtained from left and right precordial leads was calculated as the mean value of three consecutive QRST complex obtained at the same time. Dispersion of all intervals and dispersion ratios were calculated and compared. Results: QTc dispersion, JTc dispersion, Tec dispersion, QT dispersion / RR ratio, JT dispersion / RR ratio, and Te dispersion / RR ratio calculated before and after left ventriculography from left precordial derivations were found to be significantly different (p < 0.05). However, only one parameter (Te dispersion) (p < 0.05) calculated from right precordial derivations before and after left ventriculography was changed significantly. Conclusions: Preventing potential ventricular arrthythmias is mandatory during cardiac catheterization procedures. One must be always cautious which type and how much of contrast agent used during the procedures of high risk patients. Both injection pressure and contrast volume should be lessened as much as possible in order to prevent potential arrhythmias.