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Stress echocardiography with smartphone: real-time remote reading for regional wall motion

Abstract

The diffusion of smart-phones offers access to the best remote expertise in stress echo (SE). To evaluate the reliability of SE based on smart-phone filming and reading. A set of 20 SE video-clips were read in random sequence with a multiple choice six-answer test by ten readers from five different countries (Italy, Brazil, Serbia, Bulgaria, Russia) of the “SE2020” study network. The gold standard to assess accuracy was a core-lab expert reader in agreement with angiographic verification (0 = wrong, 1 = right). The same set of 20 SE studies were read, in random order and >2 months apart, on desktop Workstation and via smartphones by ten remote readers. Image quality was graded from 1 = poor but readable, to 3 = excellent. Kappa (k) statistics was used to assess intra- and inter-observer agreement. The image quality was comparable in desktop workstation vs. smartphone (2.0 ± 0.5 vs. 2.4 ± 0.7, p = NS). The average reading time per case was similar for desktop versus smartphone (90 ± 39 vs. 82 ± 54 s, p = NS). The overall diagnostic accuracy of the ten readers was similar for desktop workstation vs. smartphone (84 vs. 91%, p = NS). Intra-observer agreement (desktop vs. smartphone) was good (k = 0.81 ± 0.14). Inter-observer agreement was good and similar via desktop or smartphone (k = 0.69 vs. k = 0.72, p = NS). The diagnostic accuracy and consistency of SE reading among certified readers was high and similar via desktop workstation or via smartphone.

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Abbreviations

SE:

Stress echocardiography

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Acknowledgements

The study was supported by institutional funding of the Institute of Clinical Physiology of the Italian National Research Council.

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Correspondence to Eugenio Picano.

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Scali, M.C., de Azevedo Bellagamba, C.C., Ciampi, Q. et al. Stress echocardiography with smartphone: real-time remote reading for regional wall motion. Int J Cardiovasc Imaging 33, 1731–1736 (2017). https://doi.org/10.1007/s10554-017-1167-2

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Keywords

  • Echocardiography
  • Stress echocardiography
  • Wall motion