Vol 24, No 6 (2017)
Original articles — Clinical cardiology
Published online: 2017-05-19
Elevated high-sensitivity troponin does not indicate the presence of coronary artery disease in patients presenting with supraventricular tachycardia
Abstract
Background: Patients with supraventricular tachycardia (SVT) and patients with coronary artery disease (CAD) often present with similar symptoms (chest pain, shortness of breath), similar electrocar¬diographic changes and elevated high-sensitivity troponin (Tn). It is not clear whether troponin reflects critical CAD or is elevated due to other causes in patients presenting with SVT. The aim of this study was to assess the role of elevated troponin in patients presenting with SVT.
Methods: Patients undergoing radiofrequency ablation (RFA) for SVT and simultaneous coronary an¬giography at the Heart Centre Lucerne, Switzerland between January 2010 and October 2014 were in¬cluded in this analysis. Significant CAD was defined as diameter-stenosis ≥ 75% in vessels > 2.0 mm. The level of Tn was compared between patients with the presence or absence of CAD on coronary angi¬ography. A Tn value of ≥ 0.014 μg/L was considered as elevated.
Results: During the study period a total of 473 patients underwent RFA for SVT. The study population consisted of 326 patients (69%, mean age 60 ± 12 years) who underwent invasive coronary angiogra¬phy during the same session. The prevalence of significant CAD was 14% (45/326 patients). The highest prevalence of CAD was found in patients with atrial flutter (35%, 18/45 patients). Tn was elevated in 83% (10/12 patients) with significant CAD and in 47% (26/55 patients) without CAD.
Conclusions: The prevalence of CAD is low in patients with SVT, which questions the role of routine invasive coronary angiography during RFA. Tn measurement did not reliably exclude or confirm CAD in these patients.
Keywords: coronary artery diseaseprevalence of coronary artery diseasesupraventricular tachycardiahigh-sensitivity troponinradiofrequency ablation
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