Selection and timing for invasive therapy in non-ST-segment-elevation acute coronary syndrome
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Updated: May 12, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Pascal Meier1, Georg M Fröhlich, Stephanie Meller
1Cardiovascular Division, Yale Medical School, Division of Cardiology, New Haven, CT 06510, USA.
Insights
Patients with non-ST-segment-elevation acute coronary syndromes (NSTEACS) face higher mortality than STEMI patients. This review explores optimal NSTEACS treatment strategies, including coronary angiography timing and patient selection.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Outcomes for ST-elevation myocardial infarction (STEMI) have improved, but non-ST-segment-elevation acute coronary syndromes (NSTEACS) still exhibit high mortality.
- Longer-term mortality (4 years) for NSTEACS is approximately double that of STEMI.
- NSTEACS patients are generally older, potentially contributing to poorer prognosis, though the exact reasons remain unclear.
Purpose of the Study:
- To review and discuss optimal treatment strategies for NSTEACS.
- To clarify the role of coronary angiography in NSTEACS management.
- To provide guidance on patient selection and optimal timing for coronary angiography.
Main Methods:
- Literature review of current evidence and treatment guidelines for NSTEACS.
- Analysis of factors influencing prognosis in NSTEACS patients.
- Discussion of diagnostic and therapeutic interventions, focusing on coronary angiography.
Main Results:
- Optimal therapy for NSTEACS is less defined compared to STEMI.
- Coronary angiography plays a crucial role, but optimal timing and patient selection require careful consideration.
- Evidence-based strategies for managing NSTEACS are presented.
Conclusions:
- NSTEACS remains associated with significant long-term mortality.
- A clear, evidence-based approach to coronary angiography and overall treatment is essential for improving NSTEACS outcomes.
- Further research may elucidate specific factors contributing to NSTEACS prognosis.
Abstract:
While outcomes for ST-segment-elevation myocardial infarction has significantly decreased over the last years, patients presenting with non-ST-segment-elevation acute coronary syndromes (NSTEACS) still have a rather high mortality. Longer term mortality over 4 years is about double the mortality after a ST-segment-elevation myocardial infarction. The reason for the poorer prognosis is unclear but is very likely to be partially explained by the generally older age of NSTEACS patients. The optimal therapy for NSTEACS is less well defined. In this review, the authors specifically discuss the role of coronary angiography, how to decide which patient should undergo this procedure and whether there is an optimal time point. The review provides an up-to-date discussion about the best treatment strategies for NSTEACS.
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