[Acute coronary syndrome without ST-elevation (NSTE-ACS)]
H J Rupprecht1, Manfred Geeren2, Monika Geeren2
12. Medizinische Klinik, Klinikum Rüsselsheim, August-Bebelstr. 59, 65428, Rüsselsheim, Deutschland. hj.rupprecht@gp-ruesselsheim.de.
Insights
For acute coronary syndrome without ST-elevation (NSTE-ACS), troponin testing rapidly identifies myocardial infarction (NSTEMI). Dual antiplatelet therapy (DAPT) duration varies by patient risk, typically 12 months.
Area of Science:
- Cardiology
- Emergency Medicine
- Clinical Diagnostics
Background:
- Acute coronary syndrome without ST-elevation (NSTE-ACS) requires timely risk stratification for optimal diagnosis and treatment.
- Clinical symptoms, ECG findings, and troponin levels are critical for assessing NSTE-ACS patients.
Purpose of the Study:
- To outline the diagnostic and treatment strategies for NSTE-ACS based on patient risk profiles.
- To emphasize the role of high-sensitivity troponin assays in the rapid diagnosis of non-ST-segment elevation myocardial infarction (NSTEMI).
Main Methods:
- Utilizing 0/3-hour or 0/1-hour algorithms with high-sensitivity troponin assays for rapid NSTEMI rule-in or rule-out.
- Initiating dual antiplatelet therapy (DAPT) with aspirin and an ADP receptor antagonist in the acute phase.
- Adjusting DAPT duration based on individual patient risk for bleeding or ischemia.
Main Results:
- High-sensitivity troponin enables efficient diagnosis of NSTEMI, but troponin-negative results do not exclude unstable angina pectoris.
- DAPT is recommended for 12 months post-acute phase, regardless of treatment strategy (PCI, bypass surgery, conservative).
- DAPT duration can be shortened to 6 months for high bleeding risk or extended up to 36 months for high ischemic risk.
Conclusions:
- Risk stratification is key in NSTE-ACS management, guiding invasive strategies and treatment duration.
- Troponin testing is pivotal for diagnosing NSTEMI, while other clinical factors are essential for unstable angina.
- Tailoring DAPT duration based on bleeding and ischemic risk optimizes patient outcomes in NSTE-ACS.
Abstract:
The timing of an invasive diagnosis and treatment strategy in patients with an acute coronary syndrome without ST-elevation (NSTE-ACS) depends on the patient's risk profile. In addition to the clinical symptoms, ST/T alterations in the resting ECG as well as an increase and kinetics of troponin are of crucial importance in this setting. For the majority of patients the highly sensitive troponin enables a rapid rule in or rule out strategy of a non-ST-segment elevation myocardial infarction (NSTEMI) with a 0/3 h algorithm. An even faster 0/1 h algorithm is increasingly being used; however, troponin only helps to identify patients with NSTEMI. Troponin-negative patients can still suffer from unstable angina pectoris. A dual antiplatelet therapy (DAPT) with acetylsalicylic acid (ASS) and an ADP receptor antagonist should be initiated in the acute phase and continued for 12 months, irrespective of the initial treatment strategy, e.g. percutaneous coronary intervention (PCI), bypass surgery or conservative treatment. In patients with a high bleeding risk a duration of 6 months only may be considered, whereas in patients with a high risk of ischemia the DAPT might be prolonged for up to 36 months.
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