Myocardial Infarction with and without ST-segment Elevation: a Contemporary Reappraisal of Similarities and
Andreas Mitsis1, Felice Gragnano2
1Department of Cardiology, Nicosia General Hospital, Nicosia, Cyprus.
Insights
ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI) share causes but differ in management and short-term prognosis. Identifying high-risk NSTEMI is crucial for timely, effective treatment.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Myocardial infarction (MI) presents as STEMI or NSTEMI, both stemming from coronary artery issues.
- Epidemiological trends show decreasing STEMI and increasing NSTEMI incidence.
Purpose of the Study:
- To compare STEMI and NSTEMI, detailing similarities and differences.
- To address uncertainties in clinical presentation, management, and prognosis.
Main Methods:
- Review of current literature on STEMI and NSTEMI.
- Comparative analysis of diagnostic and therapeutic strategies.
Main Results:
- STEMI and NSTEMI share similar clinical presentations and interventional management strategies (radial access, DES, P2Y12 inhibitors).
- STEMI requires immediate reperfusion; NSTEMI necessitates risk stratification before angiography.
- STEMI has worse short-term prognosis, but long-term outcomes are comparable.
Conclusions:
- Effective management of STEMI and NSTEMI relies on understanding their distinct and shared characteristics.
- Prompt risk stratification and individualized treatment for high-risk NSTEMI can significantly improve outcomes, potentially mirroring STEMI protocols.
Abstract:
Understanding the similarities and differences between myocardial infarction with or without ST-segment elevation is an essential step for proper patients' management in current practice. Both syndromes are caused by critical stenosis or total occlusion of coronary arteries (mostly due to thrombosis on atherosclerotic plaque), and manifest with a similar clinical presentation. Recent epidemiologic studies show that the relative incidence of ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI) moves in an opposite fashion (decreasing and increasing respectively), with a prognosis that is worse at short-term follow-up for STEMI but comparable at long-term. Current management differs, as for STEMIs, immediate reperfusion is recommended, while for NSTEMIs, risk stratification is mandatory in order to stratify patients' risk, and then decide the timing for coronary angiography. Periprocedural and technical aspects of the interventional management, as well as antithrombotic medications, are for the most similarly implemented in the two types of MI, with routine radial access, DES implant, and novel P2Y12 inhibitors representing the standard of care in both cases. The following review article aims to compare the two types of MI, with and without persistent STsegment elevation. The main purpose is to explore their similarities and differences and address areas of uncertainty with regards to clinical presentation, therapeutic management, and prognosis. The identification of high-risk NSTEMI patients is important as they may require an individualised approach that can substantially overlap with current STEMI recommendations, and their mortality remains high if their management is delayed.
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