Pacing and clinical electrophysiology : PACE
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Pacing Clin Electrophysiol · Sep 2018
Coexistence of atrioventricular accessory pathways and drug-induced type 1 Brugada pattern.
Atrial arrhythmias, particularly atrioventricular nodal reentrant tachycardia, can coexist with drug-induced type 1 Brugada electrocardiogram (ECG) pattern (DI-Type1-BrP). The present study was designed to determine the prevalence of DI-Type1-BrP in patients with atrioventricular accessory pathways (AV-APs) and to investigate the clinical, electrocardiographic, electrophysiologic, and genetic characteristics of these patients. ⋯ DI-Type1-BrP is relatively common in patients with AV-APs. We identify 12-lead ECG characteristics during preexcitation and orthodromic AVRT that point to an underlying type1-BrP, portending an increased probability for development of malignant arrhythmias.
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Pacing Clin Electrophysiol · Sep 2018
QT correction across the heart rate spectrum, in atrial fibrillation and ventricular conduction defects.
Incorporation of QTc in clinical decision support systems requires accurate QT-interval correction, also during common electrocardiogram abnormalities as ventricular conduction defects (VCD). We compared the performance and predictive value of QT correction formulas to design a patient-specific QT correction algorithm (QTcA). ⋯ A patient-specific QT correction algorithm would combine accurate heart rate correction, improved predictive value of mortality, and a reduction of patients considered to be at risk.