[Management of acute coronary syndrome without ST-segment elevation]
C Liebetrau1,2,3, C W Hamm4,5,6
1Abteilung Kardiologie, Kerckhoff-Klinik, Zentrum für Herz-, Thorax- und Rheumaerkrankungen, Benekestr. 2-8, 61231, Bad Nauheim, Deutschland. c.liebetrau@kerckhoff-klinik.de.
Insights
High-sensitivity cardiac troponin assays improve diagnosis and risk stratification for non-ST segment elevation acute coronary syndrome (NSTEMI-ACS). Utilizing 1-hour or 3-hour protocols aids in timely, optimal patient care and treatment decisions.
Area of Science:
- Cardiology
- Clinical Chemistry
- Diagnostic Medicine
Background:
- Non-ST segment elevation acute coronary syndrome (NSTEMI-ACS) presents a significant mortality risk.
- Cardiac troponin I and T measurements are crucial for NSTEMI-ACS diagnosis and risk stratification.
- High-sensitivity cardiac troponin (hs-cTn) assays have advanced patient management.
Purpose of the Study:
- To evaluate the role of hs-cTn assays in diagnosing and stratifying NSTEMI-ACS.
- To determine optimal protocols for serial troponin measurements.
- To guide timely invasive diagnostics and treatment based on troponin dynamics.
Main Methods:
- Utilizing 12-channel electrocardiogram (ECG) and cardiac troponin measurements (I and T).
- Implementing high-sensitivity cardiac troponin assays.
- Applying 1-hour and 3-hour diagnostic protocols for serial troponin measurements.
- Assessing clinical presentation and differential diagnoses for troponin elevation.
Main Results:
- Hs-cTn assays enhance risk stratification and diagnosis of NSTEMI-ACS.
- Serial troponin measurements using 1-hour or 3-hour protocols aid in distinguishing causes of troponin elevation.
- Positive troponin dynamics necessitate prompt invasive diagnostics and treatment.
Conclusions:
- Hs-cTn assays are integral to modern NSTEMI-ACS management.
- Adherence to guideline-recommended serial troponin protocols ensures optimal patient care.
- Timely intervention based on troponin results is critical for improving outcomes in NSTEMI-ACS patients.
Abstract:
Acute coronary syndrome without persistent ST-segment elevation (non-ST segment elevation myocardial infarction and instable angina pectoris NSTEMI-ACS) is common and is associated with a high mortality. In addition to 12-channel echocardiograph (ECG) assessment, measurement of cardiac troponins I and T are important for risk stratification and diagnosis. The introduction of high-sensitivity cardiac troponin assays and their implementation into clinical practice has influenced risk stratification and treatment of these patients. Additional diagnostic validation must supplement routine clinical chemistry testing following the initial measurement to distinguish between different possible causes of troponin elevation above the 99th percentile. The time point for the additional troponin measurement depends on the different protocols and troponin assays and is stipulated in the current guidelines. The use of both 1‑hour and 3‑hour protocols together with the clinical presentation and work-up of possible differential diagnoses provide optimal care of patients. Patients who test positive for troponin dynamics should undergo invasive diagnostics and treatment within 24 h of presentation and within 2 h is recommended for unstable patients. Clopidogrel is indicated only in patients requiring oral anticoagulation.
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