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NSTEMI/ACS Risk Stratification (ESC 2023)

NSTEMI/ACS Risk Stratification (ESC 2023): NSTE-ACS Confirmed → Very High Risk Features? → Immediate ICA (<2h) → Antithrombotic Therapy → PCI/CABG as In...

Pathway Overview

11 steps

Algorithm Steps

11 total

  1. 01Start

    NSTE-ACS Confirmed

    Troponin positive, no ST elevation

    • Dynamic troponin rise/fall pattern
    • Ischemic symptoms
    • ECG: ST depression, T-wave changes, or normal
  2. 02Decision

    Very High Risk Features?

    Assess for immediate ICA criteria

    • Hemodynamic instability / cardiogenic shock
    • Recurrent/refractory chest pain
    • Life-threatening arrhythmias
    • Mechanical complications
    • Acute heart failure with ongoing ischemia
    • Recurrent dynamic ST/T changes
  3. If Yes
    1. 03Action

      Immediate ICA (<2h)

      Very high risk - emergent angiography

      • Activate cath lab
      • Treat as STEMI-equivalent urgency
      • Hemodynamic support if needed
    2. 04Action

      Antithrombotic Therapy

      All NSTE-ACS patients

      • Aspirin loading 150-300mg
      • P2Y12 inhibitor (timing per strategy)
      • Anticoagulation: UFH or LMWH or Fondaparinux
      • Fondaparinux preferred if conservative
    3. 05Outcome

      PCI/CABG as Indicated

      Based on angiographic findings

    4. 06Outcome

      Optimal Medical Therapy

      If no significant CAD or not revascularizable

    If No
    1. 07Decision

      High Risk Features?

      Assess for early invasive strategy

      • Confirmed NSTEMI (troponin rise/fall)
      • GRACE score >140
      • Dynamic ST/T-wave changes
      • Transient ST-elevation
    2. If Yes
      1. 08Action

        Early Invasive (<24h)

        Class IIa recommendation (2023 downgrade)

        • ICA within 24 hours
        • Note: Downgraded from Class I in 2020
        • Based on TIMACS, VERDICT trials
      2. Path rejoins step 04Shared downstream outcome
      If No
      1. 09Action

        Non-High Risk

        Selective invasive or non-invasive strategy

        • No high-risk features
        • Low GRACE score
        • Stable, no dynamic changes
      2. 10Action

        Non-Invasive Testing

        Stress testing or CT coronary angiography

        • Stress echo or stress CMR
        • CTCA for low-intermediate PTP
        • ICA if positive stress test
      3. Path rejoins step 04Shared downstream outcome
  4. 11Action

    Calculate GRACE Score

    Risk stratification tool

    • Age, Heart rate, Systolic BP
    • Creatinine, Killip class
    • Cardiac arrest at admission
    • ST deviation, Elevated markers
    • >140 = High risk, <140 = Lower risk

Guideline Source

2023 ESC Guidelines for the Management of Acute Coronary Syndromes

DOI: 10.1093/eurheartj/ehad191View Guideline

Clinical Safety Information

Clinical Decision Support — Not a Substitute for Clinical Judgment

Individual patient factors may require deviation from these recommendations.

Known Limitations

  • GRACE score calculator not integrated - use separate tool
  • Does not address specific antithrombotic dosing
  • Assumes confirmed NSTEMI diagnosis
  • Complex patients require cardiology consultation

Contraindicated Populations

pediatricpregnancy

Applicable Regions

EUUS

EU: ESC 2023 - ICA <24h now Class IIa (downgraded from Class I)

US: ACC/AHA similar approach with clinician judgment

Version 1Next review: 2027-10-01

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Frequently Asked Questions

What is the NSTEMI/ACS Risk Stratification (ESC 2023)?

The NSTEMI/ACS Risk Stratification (ESC 2023) is a risk assessment clinical algorithm for Cardiology. It provides a structured decision tree to guide clinical decision-making, based on 2023 ESC Guidelines for the Management of Acute Coronary Syndromes.

What guideline is the NSTEMI/ACS Risk Stratification (ESC 2023) based on?

This algorithm is based on 2023 ESC Guidelines for the Management of Acute Coronary Syndromes (DOI: 10.1093/eurheartj/ehad191).

What are the limitations of the NSTEMI/ACS Risk Stratification (ESC 2023)?

Known limitations include: GRACE score calculator not integrated - use separate tool; Does not address specific antithrombotic dosing; Assumes confirmed NSTEMI diagnosis; Complex patients require cardiology consultation. Individual patient factors may require deviation from these recommendations.

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