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Ambler Score Calculator

  • Age (years)
  • Female gender (1 if yes, 0 if no)
  • Renal impairment (Creatinine >200 µmol/L) (1 if yes, 0 if no)
  • Previous cardiac surgery (1 if yes, 0 if no)
  • Left ventricular dysfunction (0=good,1=moderate,2=poor)
  • Recent myocardial infarction (<90 days) (1 if yes, 0 if no)
  • Unstable angina (1 if yes, 0 if no)
  • Urgent or emergency surgery (0=elective,1=urgent,2=emergency)
  • Surgery other than isolated CABG (1 if yes, 0 if no)
  • Active endocarditis (1 if yes, 0 if no)
  • Ambler Score: Explanation and Clinical Context
    Ambler Score is a validated risk prediction model for estimating 30-day mortality after cardiac surgery, including CABG, valve procedures, and combined operations.
    It uses multiple preoperative patient characteristics, cardiac function parameters, and operation-related factors to calculate a probability of death using logistic regression.
    This tool allows clinicians to identify high-risk patients, optimize perioperative care, guide surgical decision-making, and support informed consent.
    It has been shown to provide accurate risk predictions, particularly for populations in the United Kingdom where it was developed.

    Reference:
    Ambler G, Omar RZ, Royston P, et al. A comparison of 30-day mortality risk prediction models for adult cardiac surgery. Eur Heart J. 2005;26:391-400. doi:10.1093/eurheartj/ehi099