Results: We evaluated 761 SCD cases (64% male) and 539 controls (65% male). Logistic regression was used to evaluate the association of QRS morphology with SCD. Comparisons were conducted using chi-square tests for categorical variables and independent samples t-tests for continuous variables. QRS morphology was subcategorized as normal, intermediate or completed conduction defects. Methods: Sudden cardiac death cases and controls from an ongoing large population based study in the Northwestern US (2002 to 2010) were included if age ≥ 35 years with a non-paced 12-lead ECG (recorded prior and unrelated to SCD in cases). Hypothesis: Completed conduction defects, including non-specific IVCD, are associated with increased SCD risk. Left and right bundle branch block have been studied previously, but there is little information regarding non-specific intraventricular conduction delay and risk of SCD. Introduction: We and others have reported an independent association between prolonged QRS duration and risk of sudden cardiac death (SCD) in the general population. Customer Service and Ordering Information.Stroke: Vascular and Interventional Neurology.Journal of the American Heart Association (JAHA).Circ: Cardiovascular Quality & Outcomes.Arteriosclerosis, Thrombosis, and Vascular Biology (ATVB).
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