Tisdale Risk for QT ProlongationLoading...Age ≥ 68 yearsNo0Yes+1SexMale0Female+1Patient on loop diureticNo0Yes+1Potassium ≤ 3.5 mEq/LNo0Yes+2Admission QTc ≥ 450 msecNo0Yes+2Being admitted for acute MINo0Yes+2Being admitted for sepsisNo0Yes+2Being admitted for heart failureNo0Yes+3Number of QTc-prolonging drugs givenNone01+32 or more+6