Table 1: Risk score for drug associated QTc prolongation [9].
Risk factor | Points |
Age ≥ 68 y | 1 |
Female sex | 1 |
Loop diuretic | 1 |
Acute myocardial infarction | 2 |
Admission QTc ≥ 450 ms | 2 |
Serum K + ≤ 3.5 mEq/L | 2 |
Sepsis | v |
Heart failure | 3 |
One QTc-prolonging drug | 3 |
≥ 2 QTc-prolonging drugs | 3 |
Maximum Risk Score | 21 |