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Emergency Department Patients With a Prolonged Corrected QT Interval Do Not Have Increased Thirty-day Mortality.

Prolonged QT interval (long QTc) predisposes to torsades de pointes, which can present with seizures, syncope, and sudden death. (1) While one-third of emergency department (ED) patients may have a prolonged corrected QT (QTc) interval, (2) often discovered incidentally, clinical significance is uncertain. In hospitalized patients or long-term community studies, long QTc is associated with increased mortality. (1, 3) The only ED-based study estimating mortality found that 5% of admitted patients died, although discharged patients-nearly half the cohort-were not evaluated. (2) Our study purpose was to compare the 30-day mortality rate of ED patients with long and normal QTc, including those discharged from the ED. This article is protected by copyright. All rights reserved.