Prolongation of QRS (≥ 120 ms) occurs in 14% to 47% of heart failure (HF) patients. Left
bundle branch block is far more common than right bundle branch block. Left-sided …

American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society
Scientific Statement on Noninvasive Risk Stratification Techniques for Identifying Patients at Risk …

Background—The contributions of risk factors and disease pathogenesis to heart failure with
preserved ejection fraction (HFPEF) versus heart failure with reduced ejection fraction …

Downloaded from scores the need for risk stratification techniques to identify patients at high
risk for these events and effective interventions that can prevent or abort these events …

Context Hospitalization for heart failure is associated with high postdischarge mortality and
morbidity. The predictive value of the QRS duration during admission for heart failure has …

The prevalence of conduction disturbances, particularly left bundle branch block (LBBB), is
strongly correlated with age and with the presence of cardiovascular disease. LBBB has …

Objective: QRS detection algorithms are needed to analyze electrocardiogram (ECG)
recordings generated in telehealth environments. However, the numerous published QRS …

Aims The optimum timing of cardiac resynchronization therapy (CRT) implantation is
unknown. We explored long-term outcomes after CRT in relation to the time interval from a …

Objectives: We sought to test whether the mechanical dyssynchrony assessed by tissue
Doppler imaging (TDI) is a predictor of cardiac events in patients with congestive heart …

BACKGROUND: Although QRS duration is known to be a predictor of mortality in patients
with left ventricular dysfunction, our purpose was to evaluate the prognostic power of …