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Left Ventricular End Diastolic Volume and Ejection Fraction Calculation: Correlation between Three Echocardiographic

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Summary

Comparisons of left ventricular ejection fraction (LVEF) and end diastolic volume (EDV) measurements using Simpson's biplane (SB), 3-dimensional (3DE), and speckle tracking (STE) show acceptable bias but large limits of agreement. These methods are not interchangeable, but 3DE values can be predicted from SB measurements.

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Left ventricular ejection fraction (LVEF) and end diastolic volume (EDV) are crucial cardiac parameters.
  • Simpson's biplane (SB), 3-dimensional echocardiography (3DE), and speckle tracking (STE) are common measurement methods.
  • Limited data exist on method comparisons in routine clinical practice.

Purpose of the Study:

  • To compare LVEF and EDV measurements obtained by SB, 3DE, and STE.
  • To determine the correlations between these three echocardiographic methods in a clinical setting.

Main Methods:

  • LVEF and EDV were measured using SB, 3DE, and STE in 474 consecutive patients.
  • Bland-Altman (BA) plots were used for comparison.
  • Pearson correlation coefficients (R) were calculated.

Main Results:

  • Median LVEF values were similar across methods (61-63%).
  • Median EDV values varied, with SB and STE higher than 3DE (82-85 ml vs. 73 ml).
  • Correlations (R) between SB and 3DE were moderate (0.43-0.75), influenced by image quality.
  • BA analysis revealed acceptable bias but large limits of agreement for both LVEF and EDV.

Conclusions:

  • SB, 3DE, and STE are feasible for LVEF and EDV assessment.
  • While biases are acceptable, the large limits of agreement indicate methods are not interchangeable.
  • A predictive model allows estimation of 3DE values from SB measurements, facilitating clinical application.