Cardiology · Internal Medicine · Pharmacy
Tisdale Risk Score for QTc Prolongation calculator
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Clinical inputs
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Tisdale ≤6 — low risk of QTc prolongation
Band: Tisdale ≤6 — low risk of QTc prolongation
Interpretation. Tisdale ≤6 — low risk of QTc prolongation
Suggested management. Low Tisdale risk — routine ECG monitoring as clinically indicated.
Tisdale Risk Score for QTc Prolongation: 0 — Tisdale ≤6 — low risk of QTc prolongation. Interpretation: Tisdale ≤6 — low risk of QTc prolongation What to do: Low Tisdale risk — routine ECG monitoring as clinically indicated. Inputs: Age ≥68 years (+1): false; Female sex (+1): false; Loop diuretic (+1): false; Serum K+ ≤3.5 mEq/L (+2): false; Admission QTc ≥450 ms (+2): false; Acute myocardial infarction (+2): false; Sepsis (+3): false; Heart failure (+3): false; One QTc-prolonging medication (+3): false; ≥2 QTc-prolonging medications (+3): false Source: Tisdale JE et al. Development and validation of a risk score to predict QT interval prolongation in hospitalized patients. Circ Cardiovasc Qual Outcomes. DOI: 10.1161/CIRCOUTCOMES.113.000152. PMID: 23716032. Scope: Tisdale risk score points — age ≥68 (+1), female (+1), loop diuretic (+1), K+ ≤3.5 (+2), admission QTc ≥450 ms (+2), acute MI (+2), ≥1 QTc-prolonging drug (+3), ≥2 QTc-prolonging drugs (+3), sepsis (+3), heart failure (+3); bands ≤6 low, 7–10 moderate, ≥11 high risk of QTc prolongation. (2013)
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Clinical inputs
- Age ≥68 years (+1)
- Female sex (+1)
- Loop diuretic (+1)
- Serum K+ ≤3.5 mEq/L (+2)
- Admission QTc ≥450 ms (+2)
- Acute myocardial infarction (+2)
- Sepsis (+3)
- Heart failure (+3)
- One QTc-prolonging medication (+3)
- ≥2 QTc-prolonging medications (+3)
Primary source
Tisdale JE et al. Development and validation of a risk score to predict QT interval prolongation in hospitalized patients. Circ Cardiovasc Qual Outcomes. DOI: 10.1161/CIRCOUTCOMES.113.000152. PMID: 23716032. Scope: Tisdale risk score points — age ≥68 (+1), female (+1), loop diuretic (+1), K+ ≤3.5 (+2), admission QTc ≥450 ms (+2), acute MI (+2), ≥1 QTc-prolonging drug (+3), ≥2 QTc-prolonging drugs (+3), sepsis (+3), heart failure (+3); bands ≤6 low, 7–10 moderate, ≥11 high risk of QTc prolongation. (2013)
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