convulsion is one of the most common problems in children and hypocalcemia is one the most frequent etiological items in children’s convulsion. corrected qt (qtc) in ekg is prolonged in hypocalcemia, so it can be a useful tool for evaluation of serum ionized calcium. in three groups (first seizure, multiple seizures, without seizure or control ) every 25 cases, qtc, serum ionized ca, total ca, ...

Monte Carlo simulation was used to assess the type I error rate and rank order of power for six different metrics using linear mixed-effect models, including two variables recommended by the European Agency for the Evaluation of Medicinal Products (EMEA) in the analysis of QTc interval data. The metrics analyzed were maximal change in QTc interval from baseline, maximal QTc interval, area under...

Patients may intermittently require antimicrobial therapy with a QTc-prolonging antibiotic, which presents a challenge for prescribers of patients already taking a QTc-prolonging antiarrhythmic. Manufacturers recommend close monitoring for evidence of QTc-prolongation with the concomitant use of QTc-prolonging medications, but the monitoring parameters are not well-defined. Previous studies rec...

PURPOSE The aim of this study is to evaluate the effect of dexmedetomidine on corrected QT (QTc) and Tp-e intervals in patients undergoing spinal anesthesia. MATERIALS AND METHODS We studied 50 patients who were scheduled to undergo spinal anesthesia before orthopedic surgeries. Patients were allocated to receive either an infusion of dexmedetomidine or normal saline after spinal anesthesia. ...

INTRODUCTION In this study, we investigated the outcomes for patients with intentional organophosphate poisoning. Previous reports indicate that in contrast to normal heart rate-corrected QT intervals (QTc), QTc prolongation might be indicative of a poor prognosis for patients exposed to organophosphates. METHODS We analyzed the records of 118 patients who were referred to Chang Gung Memorial...

Objectives: The aim of this study was to evaluate the prevalence and the risk factors of prolonged QTc interval among Egyptian patients with type 2 diabetes. Patients and methods: We enrolled in this cross-sectional study from June 2011 to December 2015, a total of 220 patients (108 male & 112 female) with mean age 50.42± 7.453years diagnosed with type 2 DM. Results: In this study, we found (33...

Background: The goal was to use surface electrocardiographic (ECG) indicators detect COVID-19's malignant arrhythmic potential.
 Methodology: In 51 COVID-19 patients and 40 control subjects, the ECG parameters PR, QT, QTc, QTd, TPe, Tpe/QTc were assessed. had substantially higher mean QTc (410.8 24.3 msec vs. 394.6 20.3 msec, p.001), (0.19 0.02 0.18 0.04, p =.036), median QTd (47.52 46.5) ...

AIMS Using a large, contemporary primary care population we aimed to provide absolute long-term risks of cardiovascular death (CVD) based on the QTc interval and to test whether the QTc interval is of value in risk prediction of CVD on an individual level. METHODS AND RESULTS Digital electrocardiograms from 173 529 primary care patients aged 50-90 years were collected during 2001-11. The Fram...

OBJECTIVES The study compared the influence of sympathetic stimulation on transmural and spatial dispersion of repolarization between LQT1 and LQT2 forms of congenital long QT sYndrome (LQTS). BACKGROUND Cardiac events are more associated with sympathetic stimulation in LQT1 than in LQT2 or LQT3 syndrome. Experimental studies have suggested that the interval between Tpeak and Tend (Tp-e) in t...