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TIMI Risk Score for UA/NSTEMI Calculator

  • Age > 65 years
  • > 3 Risk factors for CAD (HTN, DM, smoking, dyslipidemia, family history)
  • Known CAD (>50% stenosis)
  • Aspirin use in past 7 days
  • >2 Angina episodes in past 24 hours
  • ST-segment deviation >0.5 mm
  • Elevated cardiac biomarkers (Troponin or CK-MB)
  • TIMI Risk Score for UA/NSTEMI: Comprehensive Explanation and Clinical Context
    The TIMI (Thrombolysis In Myocardial Infarction) Risk Score is a validated tool used to predict the likelihood of adverse cardiovascular outcomes (death, myocardial infarction, or urgent revascularization) within 14 days in patients with Unstable Angina (UA) or Non ST-Elevation Myocardial Infarction (NSTEMI). It consists of seven clinical parameters, each contributing one point to the total score, allowing for rapid bedside risk stratification.
    Normal / Reference Values
    A TIMI score of 0-1 corresponds to a low 14-day event risk (~5%), while scores of 6-7 indicate a very high risk (~41%). The score assists clinicians in determining the urgency of invasive management and the intensity of antithrombotic therapy.
    Clinical Significance
    Higher TIMI scores are associated with increased risk of death, recurrent ischemia, and need for urgent revascularization. The score provides evidence-based guidance in triaging UA/NSTEMI patients for early invasive strategies versus conservative management.
    Clinical Interpretation Summary
    - 0-1: Low risk; may be managed conservatively if stable.
    - 2-3: Moderate risk; benefit from close observation and optimized medical therapy.
    - 4-5: High risk; consider early invasive evaluation (angiography).
    - 6-7: Very high risk; requires aggressive therapy and urgent invasive strategy.
    References:
    1. Antman EM et al. The TIMI risk score for unstable angina/non ST elevation MI: A method for prognostication and therapeutic decision making. JAMA. 2000;284(7):835-842.
    2. Amsterdam EA et al. 2014 AHA/ACC Guideline for the Management of Patients With Non ST-Elevation Acute Coronary Syndromes. Circulation. 2014;130:e344-e426.
    3. Fox KAA et al. Management of acute coronary syndromes: the GRACE and TIMI risk scores. Heart. 2006;92(8):1179-1184.

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