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Feasibility of simultaneous Tc99m sestamibi and 2D-echo cardiac imaging during dobutamine pharmacologic stress

Preliminary results in a female population

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Abstract

Feasibility of simultaneous 2D-Echo and SPECT Tc99m Sestamibi imaging during dobutamine infusion was evaluated in a female population with suspected coronary artery disease and scheduled for diagnostic coronary angiography. A total of 49 consecutive subjects were studied. Patients under continuous ECG and 2D-Echo monitoring underwent standard dobutamine infusion at increasing doses to a diagnostic end-point. Tc99m Sestamibi was administered at the peak of the dobutamine effect. With this approach, 35 patients were identified correctly by 2D-Echo (Sensitivity = 60.1%; Specificity = 83.3%; Agreement = 71.4%; k = 0.43). Perfusion imaging with Tc99m Sestamibi resulted in correctly identifying 41 patients (Sensitivity = 83%; Specificity = 84%; Agreement = 83.6%; k=0.67). Combining information obtained from the two tests resulted in increased specificity (92%) and decreased sensitivity (64%). Simultaneous assessment of perfusion and function with Tc99m Sestamibi and 2D-Echo imaging during dobutamine administration is easily performed without added risk or discomfort to the patient. Tc99m Sestamibi appeared to be slightly superior to 2D-Echo for the detection of CAD in this population, but the difference does not reach conventional statistical significance. The combined use of the two independent tests did not substantially improve the diagnostic accuracy of each method.

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Authors and Affiliations

  1. Istituto di Cardiologia ed Istituto di Medicina Nucleare, Ospedale di Udine, Italia

    G. A. Slavich, U. P. Guerra, G. Morocutti, C. Fresco, P. G. Orsolon & G. A. Feruglio

  2. Thoraxcentre and Department of Nuclear Medicine, University Hospital Rotterdam-Dijkzigt, Rotterdam, The Netherlands

    P. M. Fioretti & T. Forster

  3. Medco Research, Inc., Research Triangle Park, NC, USA

    C. Orlandi

Authors
  1. G. A. Slavich
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  2. U. P. Guerra
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  3. G. Morocutti
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  4. P. M. Fioretti
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  5. C. Fresco
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  6. C. Orlandi
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  7. P. G. Orsolon
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  8. T. Forster
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  9. G. A. Feruglio
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Slavich, G.A., Guerra, U.P., Morocutti, G. et al. Feasibility of simultaneous Tc99m sestamibi and 2D-echo cardiac imaging during dobutamine pharmacologic stress. Int J Cardiac Imag 12, 113–118 (1996). https://doi.org/10.1007/BF01880742

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  • DOI: https://doi.org/10.1007/BF01880742

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