It separates the failure detection concerns into two parts, the detection of failures directly noticeable by individual users, and the determination whether the individually correct local behaviors are globally consistent with th...
Duration of QRS Complex in Resting Electrocardiogram Is a Predictor of Sudden Cardiac Death in Men Background—Previous studies indicate that increased QRS duration in ECG is related to the risk of all-cause death. However, the association of QRS duratio......
Left-sided intraventricular conduction delay is associated with more advanced myocardial disease, worse left ventricular (LV) function, poorer prognosis, and a higher all-cause mortality rate compared with narrow QRS complex. It also predisposes heart failure patients to an increased risk of ventricular...
QRS complex duration enhancement as ventricular late potential indicator by signal-averaged ECG using time-amplitude alignments Ventricular late potentials (VLPs) are small-amplitude waves with a short duration that appear at the end part of the QRS complex, making a QRS complex dur... RL Avitia,...
1. 1. The difficulties of an exact and objective determination of the QRS duration are discussed in detail. 2. 2. The QRS complex usually has an isoelectric initial or terminal portion in some leads; the leads where QRS begins earliest are often not the same leads where it ends latest. ...
Objective: To explore the correlation between QRS complex duration and brain natriuretic peptide (BNP) and the sudden cardiac death (SCD) in chronic heart failure (CHF). Methods:258 patients with CHF treated in this hospital from February 2012 to June 2014 were selected as the observation group...
The clinical background, QRS complexes before pacing, and the echocardiographic findings were assessed. Males (P < 0.05), those with H-V block (P< 0.05) and a wider QRS complex of conducted and escape beats (both P < 0.01) were dominant in group I. The incidence of underlying heart ...
Although ischemia induced QRS complex changes have been described previously, their relationship with impaired reperfusion, which is known to be associated with poor clinical outcomes, is not clear.To investigate the relationship of QRS duration changes with myocardial reperfusion, we studied 165 acute ...
Understanding theelectrophysiological underpinnings of the QRS complex has become important not only to predict response but alsotofacilitate the patient-specific delivery of resynchronization therapy.doi:10.1016/j.jacc.2015.12.039Poole, Jeanne E.
INTRODUCTION: Patients with end-stage heart failure and a wide QRS complex are considered candidates for cardiac resynchronization therapy (CRT). However, 20% to 30% of patients do not respond to CRT. Lack of left ventricular dyssynchrony may explain the nonresponse. Accordingly, we evaluated the...