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QRS duration and late mortality in unselected post-infarction patients of the revascularization era
Axel Bauer1, Mari A Watanabe, Petra Barthel
1Medizinische Klinik der Technischen Universität München and Deutsches Herzzentrum München, Ismaninger Strasse 22, 81675 München, Germany.
Aims:
To assess the association of prolonged QRS duration and late mortality in unselected post-infarction patients of the revascularization era.
Methods And Results:
A total of 1455 survivors of acute myocardial infarction (MI) in sinus rhythm and under 76 years of age were enrolled. Ninety eight percent of the patients received reperfusion/revascularization therapy (90% percutaneous coronary intervention). After revascularization, prolonged QRS duration (>or=120 ms) was present in 87 patients (6.0%). Additional risk factors studied were age (>or=65 years), presence of diabetes mellitus, history of previous MI, mean heart rate (>75 b.p.m.), heart rate variability index (
Conclusion:
In the revascularization era, incidence of prolonged QRS duration is reduced. However, prolonged QRS duration is still highly correlated with increased late mortality.
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