Ha LD, et al. - Researchers determined the prevalence of P-wave patterns and identified the components show relations to cardiovascular death (CVD) in this retrospective analysis of 20,827 veterans <56 years of age who underwent electrocardiograms at a Veteran's Affairs Medical Center from 1987 to 1999. They applied Receiver Operating Characteristic, Kaplan-Meier and Cox Hazard analyses, the latter with adjustment for age, gender and electrocardiography abnormalities. Three patterns of P-wave were identified. Independent and significant associations with CVD of a negative P-wave in V1 or V2 ≤-100μV, and P-wave with a duration of ≥140 ms was shown, with HRs similar to other electrocardiography abnormalities.