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Registros recuperados: 3
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Differentiating origins of outflow tract ventricular arrhythmias: a comparison of three different electrocardiographic algorithms BJMBR
Jiao,Z.Y.; Li,Y.B.; Mao,J.; Liu,X.Y.; Yang,X.C.; Tan,C.; Chu,J.M.; Liu,X.P..
Our objective is to evaluate the accuracy of three algorithms in differentiating the origins of outflow tract ventricular arrhythmias (OTVAs). This study involved 110 consecutive patients with OTVAs for whom a standard 12-lead surface electrocardiogram (ECG) showed typical left bundle branch block morphology with an inferior axis. All the ECG tracings were retrospectively analyzed using the following three recently published ECG algorithms: 1) the transitional zone (TZ) index, 2) the V2 transition ratio, and 3) V2 R wave duration and R/S wave amplitude indices. Considering all patients, the V2 transition ratio had the highest sensitivity (92.3%), while the R wave duration and R/S wave amplitude indices in V2 had the highest specificity (93.9%). The latter...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Premature ventricular contraction; Ventricular tachycardia; Electrocardiogram; Radiofrequency catheter ablation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000500605
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Time-domain signal-averaged electrocardiogram in healthy German Shepherd and Boxer dogs Arq. Bras. Med. Vet. Zootec.
Chamas,P.P.C.; Oliveira,V.M.C.; Yamaki,F.L.; Larsson,M.H.M.A..
Signal-averaged electrocardiogram (SAECG) identifies ventricular late potentials (LP), low-amplitude electrical signals that are markers of slow cardiac conduction in fibrous myocardium, consisting in a predictive factor for sudden death in dogs at risk of sustained ventricular tachycardia. The aim of this study was to establish reference values of SAECG for German Shepherd and Boxer dogs. SAECG was performed in 19 German Shepherd and 28 Boxer client-owned dogs, and parameters analyzed were QRSd (duration of filtered QRS), LAS<40μV (duration of low-amplitude signals in terminal portion of filtered QRS) and RMS40 (root square of mean voltage over the last 40 milliseconds of filtered QRS), with two different filters (25-250 Hz and 40-250 Hz). Statistical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canine; High-resolution electrocardiography; Ventricular tachycardia; Arrhythmogenic right ventricular cardiomyopathy.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300778
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Utility of a novel risk score for prediction of ventricular tachycardia and cardiac death in chronic Chagas disease - the SEARCH-RIO study BJMBR
Benchimol-Barbosa,P.R.; Tura,B.R.; Barbosa,E.C.; Kantharia,B.K..
The SEARCH-RIO study prospectively investigated electrocardiogram (ECG)-derived variables in chronic Chagas disease (CCD) as predictors of cardiac death and new onset ventricular tachycardia (VT). Cardiac arrhythmia is a major cause of death in CCD, and electrical markers may play a significant role in risk stratification. One hundred clinically stable outpatients with CCD were enrolled in this study. They initially underwent a 12-lead resting ECG, signal-averaged ECG, and 24-h ambulatory ECG. Abnormal Q-waves, filtered QRS duration, intraventricular electrical transients (IVET), 24-h standard deviation of normal RR intervals (SDNN), and VT were assessed. Echocardiograms assessed left ventricular ejection fraction. Predictors of cardiac death and new onset...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chagas heart disease; Noninvasive electrocardiography; Prognostic score; Cardiac death; Ventricular tachycardia.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013001100974
Registros recuperados: 3
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