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Prevalence and predictors of left intraventricular dyssynchrony determined by phase analysis in patients undergoing gatedSPECT myocardial perfusion imaging

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Abstract

Left ventricular dyssynchrony (LVD) is an independent predictor of adverse cardiovascular events, death, and progression to heart failure. Myocardial perfusion imaging (MPI) with ECG-gated single-photon emission computed tomography (SPECT) can be used to diagnose LVD rapidly and automatically using phase analysis (PA). The objective of this study was to evaluate the prevalence and predictors of LVD in patients undergoing MPI. Clinical, electrocardiographic, and scintigraphic data from 1000 patients who underwent MPI with ECG-gated SPECT over a period of 1 year were analyzed retrospectively. TheEmoryCardiac Toolboxsoftware was used for PA, and LVD was diagnosed based on the following criteria: standard deviation of LV phase distribution ≥43° and/or phase histogram ≥140° in the resting and/or stress phase of the examination. Several variables were evaluated using univariate and multivariate analyses. The prevalence of LVD in the study population was 6.5 %, and the average age was 63.6 ± 12 years. The variables significantly associated with LVD were male gender, obesity, hypertension, diabetes, dyslipidemia, coronary artery disease (CAD), QRS interval ≥120 ms, LV dysfunction, and myocardial perfusion defects (especially fixed defects) on MPI. Although the PA parameters were greater at rest, both phases could be used for diagnosis. Multivariate analysis revealed that the variables significantly associated with LVD were male sex, obesity, history of CAD, and QRS interval ≥120 ms. The overall prevalence of LVD was 6.5 % in patients undergoing MPI in this study, and it reached 42 % in the presence of certain risk factors.

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Authors and Affiliations

  1. Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil

    Adriana Tavares, Thais Peclat & Ronaldo Souza Leão Lima

  2. Clinica de Diagnóstico por Imagem, Rio de Janeiro, RJ, Brazil

    Ronaldo Souza Leão Lima

Authors
  1. Adriana Tavares
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  2. Thais Peclat
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  3. Ronaldo Souza Leão Lima
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Correspondence to Ronaldo Souza Leão Lima.

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The authors declare that they have no financial or other conflict of interest.

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The institutional review board approved the study and informed consent was obtained from all patients.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Tavares, A., Peclat, T. & Lima, R.S.L. Prevalence and predictors of left intraventricular dyssynchrony determined by phase analysis in patients undergoing gatedSPECT myocardial perfusion imaging. Int J Cardiovasc Imaging 32, 845–852 (2016). https://doi.org/10.1007/s10554-015-0833-5

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  • DOI: https://doi.org/10.1007/s10554-015-0833-5

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