Prognostic implications of increased QRS duration in patients with moderate and severe left ventricular systolic dysfunction

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  • Eight-year prognostic value of QRS duration in patients with known or suspected coronary artery disease referred for myocardial perfusion imaging

    2015, American Journal of Cardiology
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    This association was still significant after adjustment for clinical variables and MPI results. Previous studies have shown the prognostic significance of QRS duration in patients with cardiac disease, including heart failure,1,2 left ventricular systolic dysfunction,3 acute coronary syndrome,4 and atrial fibrillation.5 In the past years, more evidence has come into existence addressing the prognostic significance of prolonged QRS duration in a relatively lower risk group of patients, including patients referred for suspected CAD and the general population.

  • Association of QRS duration and survival in dogs with dilated cardiomyopathy: A retrospective study of 266 clinical cases

    2011, Journal of Veterinary Cardiology
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    Another study demonstrated that a prolonged QRS duration was an independent predictor of increased mortality and sudden cardiac death among patients with cardiomyopathy, HF and 10 or more ventricular premature complexes (VPCs) per hour.3 Many other studies have been done and they have demonstrated a relationship between a prolonged QRS duration and a worsening of the prognosis, including an increased risk of death.3–6 The aim of this study was to determine whether there was a similar relationship between QRS duration and survival in dogs with DCM, based on a simple cut-off value on the surface ECG.

  • Clinical Trials of Cardiac Resynchronization Therapy: Pacemakers and Defibrillators

    2011, Clinical Cardiac Pacing, Defibrillation and Resynchronization Therapy
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