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  • Title: Diagnostic and prognostic value of a careful symptom evaluation and high sensitive troponin in patients with suspected stable angina pectoris without prior cardiovascular disease.
    Author: Madsen DM, Diederichsen ACP, Hosbond SE, Gerke O, Mickley H.
    Journal: Atherosclerosis; 2017 Mar; 258():131-137. PubMed ID: 28031149.
    Abstract:
    BACKGROUND AND AIMS: Typical angina pectoris (AP) and high-sensitive troponin I (hs-TnI) are independently associated with coronary artery disease (CAD) and future cardiovascular events (CVE). This study aimed to assess the individual and combined diagnostic and prognostic impact of symptoms and hs-TnI in stable chest pain patients without prior cardiovascular disease. METHODS: During a one-year period, 487 patients with suspected stable AP underwent invasive or CT-coronary angiography (significant stenosis ≥50%). At study inclusion, a careful symptom evaluation was obtained, and patients were classified as having typical AP, atypical AP, or non-cardiac chest pain. Hs-TnI was measured in all patients and divided into tertiles for analysis. Follow-up was a median of 4.9 years with cardiovascular death, non-fatal myocardial infarction, unstable AP, ischemic stroke, coronary-artery-bypass-grafting, percutaneous coronary intervention, and peripheral vascular surgery as combined endpoint. RESULTS: Hs-TnI was detected in 486 patients (99.8%). By multivariate regression analysis, typical AP and hs-TnI elevation were associated with increased risk of having significant CAD (typical AP, OR: 3.46; 95% CI: 2.07-5.79; p < 0.0001, hs-TnI, OR: 1.50; 95% CI: 1.12-2.01; p = 0.007) and experiencing future CVE (typical AP, HR: 2.64; 95% CI: 1.74-3.99; p = 0.001, hs-TnI, HR: 1.26; 95% CI: 1.06-1.49; p = 0.008). Patients in the lowest hs-TnI tertile, without typical AP (n = 107) had a 1.9% absolute risk of significant CAD and a 3.7% absolute risk of long-term CVE. CONCLUSIONS: In clinical stable patients without known cardiovascular disease, a thorough chest-pain history in combination with hs-TnI testing can identify a significant low-risk group. The prognostic need for coronary angiography in these patients seems limited.
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