BACKGROUND Cigarette smoking increases the risk of ventricular fibrillation and sudden cardiac death (SCD). QT dispersion (QTD) is an important predictor of cardiac arrhythmia. The aim of this study was to assess the acute effect of smoking a single standard cigarette containing 1.7 mg nicotine on QT interval and QTD in healthy smokers and nonsmokers. METHODS The study sample population consi...

Objective: To clarify the hemodynamic-stabilizing effect of remifentanil in the context of modified electroconvulsive therapy (mECT), we measured electrocardiographic alterations in the corrected QT interval (QTc) and corrected QT dispersion (QTcD), considered predictive of ventricular arrhythmia, during mECT. Methods: Sixty patients scheduled for mECT were divided randomly into 3 groups. Patie...

OBJECTIVE To evaluate the effects of corrected QT dispersion (QTcd) on patients` prognosis with early stage non-lacunar ischemic stroke, regardless of location of the lesion. METHODS In this non-randomized prospective study, stroke patients were evaluated in the intensive care unit of Cukurova University Hospital, School of Medicine, Adana, Turkey, from 2002-2003. Neurologic symptoms of all s...

BACKGROUND AND OBJECTIVES In our study we aimed to investigate the effect of bupivacaine and levobupivacaine on QT, corrected QT (QTc), and P wave dispersion durations during spinal anesthesia in cesarean section. METHODS Sixty parturients scheduled for elective cesarean section in ASA I-II risk groups were included in the study. Baseline electrocardiographic (ECG) records of the patients wer...

BACKGROUND In electrocardiography (ECG), QT is the interval between the onset of Q wave to the end of the T wave. This interval may be a sign of changes in the ventricular structure in hematologic disorders such as thalassemia major. OBJECTIVES The main goal of this study was to compare the diagnostic value of corrected QT dispersion (QTcd) and QT dispersion (QTd) with left ventricular mass (...

Objective: Increased risk for arrhythmias and the association between arrhythmogenic markers symptom severity in antipsychotic-free patients with schizophrenia are understudied. We evaluated changes P-wave dispersion (PWD), corrected QT interval (QTc), QTc (QTcd), JT (JTc), JTc (JTcd), Tpeak-Tend (Tp-e), Tp-e/QT ratio. Method: Fifty-six who were at least 1 month 56 age- gendermatched healthy co...

The study presents a comparison of the results received from dogs with dilated cardiomyopathy (DCM) that died during the first 30 d of observation and from dogs with DCM that survived the first 30 d after the ECG. No differences were noted in the duration of QT or QTc in healthy dogs and dogs with DCM. QTcd was significantly higher in dogs with DCM and in dogs with DCM, which did not survive ov...

BACKGROUND QT dispersion (QTd), which is a measure of inhomogeneity of myocardial repolarization, increases following impaired myocardial perfusion. Its prolongation may provide a suitable substrate for life-threatening ventricular arrhythmias. We investigated the changes in QTd and heart rate variability (HRV) parameters after successful coronary artery revascularization in a patient with chro...

OBJECTIVE Breath holding spells (BHS) are common involuntary reflexes in infancy and early childhood. Differential diagnosis should embrace Long QT Syndrome (LQTS) and paroxysmal abnormalities of rhythm. The aim of this study was to compare QT dispersion (QTd) in children with breath holding spells and normal controls. MATERIALS & METHODS QT dispersion and Corrected QT(QTc) dispersion were me...

We read the article entitled ‘‘The effect of esmolol on corrected-QT interval, corrected-QT interval dispersion changes seen during anesthesia induction in hypertensive patients taking an angiotensin-converting enzyme inhibitor’’ by Ceker et al. with interest.1 The authors investigated the effects of esmolol on the hemodynamic, correctedQT (QTc) interval and corrected-QT interval dispersion (QT...