A prolongation of QT interval has been shown in patients with cirrhosis and it is considered as part of the definition of the so-called 'cirrhotic cardiomyopathy'. The aim of the present study was to assess the determinants of QT interval prolongation in cirrhotic patients. Forty-eight male patients with different stages of liver disease were divided into three subgroups according to the Child-...

BACKGROUND AND AIM We investigated the effect of adrenaline on desflurane-induced prolonged corrected QT (QTc) interval. PATIENTS AND METHODS Sixty-two adult patients scheduled for nasal surgery were included. Following intubation, packs soaked in physiological saline were used for Group C (control) and packs soaked in adrenaline (1/200,000, 5 ml) were used for Groups A1 and A2. Group A2 was ...

background: prolonged qt interval may lead to serious arrhythmias and ventricular fibrillation, hence prevention of the qt-interval prolongation is crucial for physicians. the aim of this study was to assess the influence of intravenous lidocaine on the qtc interval resulting from spinal anesthesia with bupivacaine. methods: in a randomized double blind trial, fifty male patients with mean age ...

Objective: To identify the effects of antipsychotics on QTc prolongation in light of age, gender, antipsychotic combination pattern, antipsychotic doses and cytochrome P450 (CYP) mediation, using large database describing the antipsychotic treatment of patients with schizophrenia in Japan. Methods: Using database of 4176 patients with schizophrenia discharged between April 2004 and March 2005 a...

There has been recent concern about the association between high dose methadone and prolongation of QTc in the electrocardiogram. QTc is the time from the beginning of the QRS complex to the end of the T have as measured on an electrocardiogram and corrected for heart rate. To date, no association has been made between methadone and buprenorphine in commonly used doses and prolonged QTc. Electr...

In acute pulmonary thromboembolism (PTE), right ventricular pressure overload impairs right-sided cardiac conduction and repolarization. We hypothesized that if heterogeneity of repolarization between right and left ventricles occurs in acute PTE, there would be the difference of repolarization between them. Therefore, we aimed to evaluate the diagnostic value of corrected QT interval (QTc) dif...

BACKGROUND Neonatal electrocardiographic screening is used to screen infants with prolonged QT intervals, as previously shown in whites. However, this procedure needs to be confirmed in other ethnic groups. METHODS AND RESULTS In 8 areas in Japan, an ECG was recorded in 4285 infants at 1-month medical checkup. A prospective study showed that a provisional criterion of QTc≥470 ms was appropria...

AIMS The QT interval in the surface ECG is one of the most often used risk stratifiers in families with congenital long QT syndrome (LQTS). The best ECG lead for clinical management of LQTS families remains unclear. METHODS AND RESULTS The predictive power of the QTc interval in all ECG leads was studied in 200 consecutive genotyped LQTS family members to identify mutation carriers (n = 103; ...

To the Editor: Cholinesterase inhibitors are widely accepted as established therapeutic intervention across the entire severity spectrum of Alzheimer’s disease. However, fear of increased corrected QT interval (QTc) time is one of the main reasons for nonprescription of cholinergic drugs.1 While it is generally accepted that therapeutic efficacy of cholinergic therapy is dose dependent, a large...

OBJECTIVE Hypertrophic cardiomyopathy (HCM) as a common genetic heart disease characterized by ventricular hypertrophy and myocardial fibrosis is significantly associated with a higher risk of fatal ventricular arrhythmic events (VAEs). We aimed to assess the interval between the peak and the end of the electrocardiographic T wave (Tp-e) and Tp-e/corrected QT (QTc) ratio as candidate markers of...