1. Impact of QRS Duration and Morphology on the Risk of Sudden Cardiac Death in Asymptomatic Patients With Aortic Stenosis
- Author
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Kristian Wachtell, Anders M. Greve, Kurt Boman, Anne B. Rossebø, Lars Køber, Ronnie Willenheimer, Christa Gohlke-Baerwolf, Simon Ray, Eva Gerdts, and Richard B. Devereux
- Subjects
medicine.medical_specialty ,Bundle branch block ,business.industry ,medicine.disease ,Asymptomatic ,Confidence interval ,Sudden cardiac death ,QRS complex ,Stenosis ,Ezetimibe ,Simvastatin ,Internal medicine ,cardiovascular system ,medicine ,Cardiology ,cardiovascular diseases ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
Objectives The aim of the study was to examine the predictive value of QRS duration and morphology during watchful waiting in asymptomatic patients with aortic stenosis (AS). Background QRS duration and morphology are associated with poor prognosis in many different populations, but the predictive value, particularly of the risk of sudden cardiac death (SCD), in asymptomatic patients with AS has not been well studied. Methods Data were obtained in asymptomatic AS patients randomized to simvastatin/ezetimibe combination versus placebo in the SEAS (Simvastatin and Ezetimibe in Aortic Stenosis) study. The impact of QRS duration, evaluated as a categorical variable of = 100 ms (excluding bundle branch block [BBB]) and QRS morphology in those with BBB, on cardiovascular morbidity and mortality was assessed by adjusting for clinical and echocardiographic covariates. Results QRS data were available in 1,542 patients who were followed for a mean of 4.3 +/- 0.8 years (6,631 patient-years of follow-up). There were 68 cardiovascular deaths (4.6%), including 27 SCDs (1.8%). QRS duration was = 100 ms in those without BBB in 144 (9.3%), and 102 (6.6%) in those with BBB. In multivariable analyses, those with QRS duration >= 100 ms had, compared with those with QRS duration
- Published
- 2012
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