Abstract
Regadenoson Stress Echocardiography (RSE) can detect myocardial ischemia, and its diagnostic accuracy should be evaluated. We sought to investigate the agreement between RSE and gated-SPECT myocardial perfusion imaging (MPI) and appraise its diagnostic accuracy. Consecutive patients (n = 202) referred for non-invasive evaluation of myocardial ischemia, with (38.6%) or without a previous coronary artery disease (CAD) diagnosis, were enrolled. Both tests were performed simultaneously. Invasive coronary angiography (CA) is considered the gold standard. The mean age was 70.9 (9.8) years, and 59.9% were male. The prevalence of cardiovascular risk factors (arterial hypertension [81.7%], diabetes mellitus [37.6%], hypercholesterolemia [71.8%], and smoking [18.8%]) was high. Forty-four patients (21.8%) had a non-interpretable electrocardiogram, 15 (34.1%) of them were a result of ventricular paced-rhythm, while 29 (65.9%) were a result of advanced left ventricular branch block. The overall agreement between both diagnostic techniques was good: Gwet’s AC1 0.66 (CI95% 0.55 to 0.76), and it was higher in patients without a previous CAD diagnosis: 0.76 (CI95% 0.65 to 0.87). In the biased sample (those who underwent CA), RSE and nuclear study sensitivity was 0.50 and 0.78 and specificity was 0.75 and 0.75, respectively. We noted a dramatic reduction in sensitivity for RSE after debiasing (debiased sensitivity of 0.16), and the negative predictive value was similar to the biased and debiased samples. RSE is in strong agreement with gated-SPECT MPI. However, its low sensitivity and negative predictive value preclude its use as a bedside test to detect myocardial ischemia.
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Data availability
The dataset used in this study can be retrieved in: Iglesias-Garriz, Ignacio (2020), “Regadenoson stress echo and gated-SPECT, phase 2.”, Mendeley Data, V2, https://doi.org/10.17632/8vkpcz8wxd.2.
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Acknowledgements
We are indebted to Concepción Gonzalez-Anton, Silvia Marcos-Rey, and Monica Dominguez-Barriales for their excellent nursing care of the patients during the stress studies.
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All authors contributed to the study conception and design. The first draft of the manuscript was written by the first author and all the contributors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Approval was obtained from the ethics committee of our institution. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.
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Iglesias-Garriz, I., Vara-Manso, J., Sevilla, A. et al. Diagnostic accuracy of regadenoson stress echocardiography: concordance with gated-spect myocardial perfusion imaging. Int J Cardiovasc Imaging 37, 509–515 (2021). https://doi.org/10.1007/s10554-020-02033-x
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DOI: https://doi.org/10.1007/s10554-020-02033-x