Journal of electrocardiology
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Controlled Clinical Trial
Transtelephonic electrocardiography in the management of patients with acute coronary syndrome.
The efficacy of the transtelephonic ECG system (TTECG) in the management of ST segment elevation myocardial infarction (STEMI) was examined with regard to the ambulance service- and percutaneous coronary intervention (PCI)-related delay times, the prehospital medical therapy and the in-hospital mortality rate. ⋯ The findings illustrate that TTECG is a valuable tool which may potentially improve the regional management of STEMI patients.
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Digitized electrocardiography permits the rapid, automated quantification of electrocardiograms (ECGs) for analysis. Community- and population-based studies have increasingly integrated such data. Assessing the reproducibility of automated ECG measures with manual measures is a critical step in preparation for using automated measures for research purposes. We recently established an ECG repository of digitally recorded ECGs for the Framingham Heart Study and we sought to assess the reproducibility of automated and manual measures. ⋯ The interrater reproducibility findings for P wave amplitude, PR interval, QT interval, QRS duration, and R wave amplitude were excellent. In contrast, the reproducibility of P wave duration was more modest. These findings indicate high reproducibility of most automated and manual ECG measurements.
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The ECG characteristics of premature ventricular contractions (PVCs) in subjects with Brugada syndrome (BrS) phenotype were investigated. ⋯ PVCs in BrS usually originate from the RVOT and display specific ECG characteristics that might be indicative of an epicardial origin. The prolonged interval criteria may be related to a localized epicardial conduction delay.
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Multicenter Study Observational Study
Racial susceptibility for QT prolongation in acute drug overdoses.
QT prolongation independently predicts adverse cardiovascular events in suspected poisoning. We aimed to evaluate the association between race and drug-induced QT prolongation for patients with acute overdose. ⋯ We found significant racial susceptibility to drug-induced QT prolongation in this large urban study of acute overdoses.
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Clinical Trial
The pattern of Tpeak-Tend and QT interval, and J wave during therapeutic hypothermia.
The electrocardiogram manifestations of hypothermia include J waves and prolongation of QT intervals. This study described changes in repolarization patterns during therapeutic hypothermia (TH). ⋯ QTc prolongation without TpTe increase or abnormal J wave may not be arrhythmogenic during TH.