FIGURE 1.

Predicted 5-year risk of life-threatening arrhythmic events (aborted cardiac arrest, sudden cardiac death, or appropriate ICD shocks) for some example risk factor combinations for patients with a QTc ≥ 470 ms. Blue color indicates a predicted 5-year risk of < 4%, yellow color indicates a predicted 5-year risk of 4– < 6%, and red color indicates a predicted 5-year risk of ≥6%. Numbers in this figure are percentage. BB: beta-blockers. We chose three QTc values (470, 500, and 550 ms) and three age groups at baseline (≤8 years, 13– < 20 years, and ≥20 years) as examples. We did not show the age group of 8–13 years. Given that the 5-year risk prediction interval includes age 13 for patients aged 8–13 years at baseline, in this age group each unique age has a unique predicted risk. Thus, graphical presentation can be cumbersome. The online risk calculator can compute predicted risk for any age points.