[PDF] Top 20 Issues in QT interval measurement
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Issues in QT interval measurement
... induce QT interval ...the QT interval as their main pharmacological effects, non- antiarrhythmic drugs such as antipsychotic, antiallergic, antibiotics and gastroenterologic agents have been ... See full document
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Prolonged Rate-Corrected QT Interval and Other Electrocardiogram Abnormalities in Girls With Turner Syndrome
... Standard 12-lead ECGs were obtained by using Hewlett Packard Pagewriter machines (Palo Alto, CA). All ECGs were recorded at 25 mm/second with an amplitude of 1 mV/10 mm and 60-Hz filtering. They were analyzed by using ... See full document
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Evaluation of acute cardiovascular effects of immediate-release methylphenidate in children and adolescents with attention-deficit hyperactivity disorder
... The mean, standard deviation, ranges, t, P, and d values of the ECG measurements before and 2 hours postintake of IR-MPH are shown in Table 1. No abnormal findings were observed in the ECG results at both times, ... See full document
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Methods of Assessment and Clinical Relevance of QT Dynamics
... individual QT/RR pattern assessed under similar conditions is stable, “fingerprint-like” in each subject and differs substantially between different subjects which suggests that the inherent, probably genetically ... See full document
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The effects of intravenous anesthetics on QT interval during anesthetic induction with desflurane
... pre-specified measurement time point with a computerized electrocar- diographic recorder (model FX-7432; Fukuda Denshi, Tokyo, Japan) at a paper speed of 25 ...digitally. QT inter- vals were measured using ... See full document
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The Implications of a Relationship Between Prolonged QT Interval and the Sudden Infant Death Syndrome
... prolonged QT. Furthermore, in 8 of the families with 1 parent who had prolonged QT, 9 of the 23 SIDS siblings also had prolonged QT interval, consistent with an autosomal dominant pattern of ... See full document
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QT Interval Variability in Patients with Obstructive Sleep Apnea
... al. QT interval variability in body surface ECG: Measurement, physiological basis, and clinical value: Position statement and consensus guidance endorsed by the European Heart Rhythm Association ... See full document
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Frequency, characteristics and risk factors of QT interval prolonging drugs and drug-drug interactions in cancer patients: a multicenter study
... The QT interval on an electrocardiography (ECG) rhythm strip indicates phases of ventricular depolarization and consequent repolarization and its measurement is taken from the point where QRS complex ... See full document
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Effects of Cisapride on Corrected QT Interval, Heart Rate, and Rhythm in Infants Undergoing Polysomnography
... The QT and R-R intervals were measured blinded in 3 consecutive heart cycles with calipers at approxi- mately hourly intervals (10, 60, 120, 180, 240, 300, 360, and 420 minutes) and ...averaged. Measurement ... See full document
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Tomenendalova J: How to approach the QT interval in dogs – the state of the heart: a review
... Measuring the QTi is complicated by a number of factors, both technical and physiological, which can compromise the accuracy of QT measurement. QTi can vary with the lead, the heart rate, the gen- der, time ... See full document
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THE EFFECT OF ORAL DOMPERIDONE ON QTC INTERVAL IN INFANTS AND CHILDREN
... Long QT syndrome is one of the most important causes of arrhythmia that can cause syncopal attacks and even death in ...Long QT syndrome is considered if QTc interval measured is ≥ ...accurate ... See full document
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The Relationship between Thyroid Hormone Levels and Corrected QT Interval and QT Dispersion in Non Diabetic Hemodialysis Patients
... QTc interval (QTc) and QTc dispersion ...and measurement of thyroid hormone levels were ...QTc interval and hyperhomocysteinemia in non- diabetic hemodialysis ... See full document
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C-reactive protein is associated with ventricular repolarization dispersion among patients with metabolic syndrome
... manual measurement of the values using a digital caliper with measuring range of 0-150 mm, ...accuracy. QT interval dispersion was obtained by the difference between the maximum and the minimum ... See full document
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QTc and psychopharmacs: are there any differences between monotherapy and polytherapy
... the QT interval and greater occur- rence of sudden cardiac death ...The QT interval is the sequence of the ECG from the beginning of the QRS com- plex to the end of the T wave and represents ... See full document
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Sudden Infant Death Syndrome: Normal QT Interval on ECGs of Relatives
... ECG studies in a total of 108 first-degree relatives of 26 patients with this syndrome in comparison with 99 such subjects from 22 control families failed to show any significant differe[r] ... See full document
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QT Interval Prolongation and QRS Voltage Reduction in Patients with Liver Cirrhosis
... QTc interval prolongation, and they should therefore be avoided in anesthetic proce- dures in LQTS and liver cirrhosis patients, due to the increased risk of perioperative malignant ven- tricular arrhythmias ... See full document
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Ectopic expression of KCNE3 accelerates cardiac repolarization and abbreviates the QT interval
... While QT interval of the model ECG was reduced to a greater degree than with 25% uniform transmural transduc- tion (Figure 7, a and b), the dispersion of repolarization across the ventricular wall was ... See full document
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Antenatal Use of Selective Serotonin-Reuptake Inhibitors and QT Interval Prolongation in Newborns
... QTc interval in ...Similarly, QT and JT intervals were also significantly longer among SSRI antidepres- sant-exposed neonates, reflecting delayed cardiac repo- ...QTc interval by ⬎ 30% of baseline ... See full document
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Effect of Position on Sleep, Heart Rate Variability, and QT Interval in Preterm Infants at 1 and 3 Months’ Corrected Age
... corrected QT interval; HRV, heart rate variability; PCA, postcon- ceptual age; W, awake; AS, active sleep; QS, quiet sleep; IS, inde- terminate sleep; ECG, electrocardiogram; SDNN, standard devia- tion of ... See full document
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Identification of Patients At Risk of QT Interval Prolongation during Medication Reviews: A Missed Opportunity?
... potential QT interval-prolonging drugs, the pharmacists specifically mentioned patients being at risk of QT interval ...several QT interval-prolonging drugs concomitantly (n = ... See full document
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