Figure 2.

Total monthly enrollment by recruitment method. Cumulative email alerts shown for nonunique medical record numbers (n = 1490). Conventional recruitment methods included canvassing of key medical units, engaging departments of subspecialists, and a custom-built electronic dashboard of all electrocardiograms with prolonged corrected QT intervals. No email alerts triggered for 5 months of the study due to a combination of electronic health record (EHR) transition and fewer unenrolled patients with a history of disease.