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MRI Helps Screen Teens for SCD Risk at Exercise, but Should It?

When more than 5000 middle-school children were screened with ECG and MRI for predisposition to sudden cardiac death during intense exercise, 1.48% had findings that suggested that they were in fact at high risk.

The most common findings putting them in the high-risk category were a corrected QT interval (QTc) above 470 ms on ECG, followed by an MRI-detected coronary anomaly.MRI-detected dilated cardiomyopathy or hypertrophic cardiomyopathy  was rare.

With this type of screening program, cardiologists would be "called in to evaluate only 1.5% of all candidates, whereas the other 98.5% receive definitive reassurance" about their risk of sudden cardiac death, said Dr Paolo Angelini (Texas Heart Institute, Houston), presenting these findings from the Screen to Prevent (S2P) study at the American College of Cardiology (ACC) 2017 Scientific Sessions.