What question did this study set out to answer?

To evaluate the feasibility and accuracy of velocity vector imaging (VVI) compared with conventional two-dimensional echocardiography for measuring left atrial volumes and ejection fraction.

March 25, 2010International journal of cardiac imagingOpen Access

Velocity vector imaging to quantify left atrial function

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Why the study?

Does velocity vector imaging (VVI) accurately quantify left atrial volumes and ejection fraction compared to conventional 2D echocardiography?

Key Points

To evaluate the feasibility and accuracy of velocity vector imaging (VVI) compared with conventional two-dimensional echocardiography for measuring left atrial volumes and ejection fraction.
Retrospective analysis of transthoracic echocardiograms from 100 patients (71 men, 29 women; mean age 57 ± 19.8 years), stratified by left ventricular ejection fraction (LVEF >50% vs. <50%).
Calculated indexed maximum left atrial volume (LAVImax), indexed minimum volume (LAVImin), and left atrial ejection fraction (LAEF) using apical four-chamber VVI automated pixel tracking versus 2D Simpson's biplane disc summation method.
VVI showed strong correlations with 2D echocardiography for LAVImax (r = 0.94, P < 0.0001), LAVImin (r = 0.94, P < 0.0001), and LAEF (r = 0.79, P < 0.0001).
For detecting left ventricular systolic dysfunction, LAVImax ≥ 40 ml/m² was 94% sensitive and 72% specific, LAVImin ≥ 27 ml/m² was 90% sensitive and 86% specific, and LAEF < 30% was 80% sensitive and 96% specific.
VVI image processing achieved a 62% reduction in measurement time compared to conventional 2D Simpson's biplane assessment.

Structured PICO

Does velocity vector imaging (VVI) accurately quantify left atrial volumes and ejection fraction compared to conventional 2D echocardiography?

Population

100 transthoracic echocardiographic findings in 71 men and 29 women (mean age 57 +/- 19.8 years), divided into subgroups with LVEF > 50% and LVEF < 50%.

Intervention

Velocity vector imaging (VVI) for assessing left atrial volumes (LAV) and left atrial ejection fraction (LAEF)

Comparator

2-dimensional echocardiography (2DE) using Simpson's biplane disc summation method

Outcome

Correlation of indexed maximum LAV (LAVImax), indexed minimum LAV (LAVImin), and LAEF between VVI and 2DEsurrogate

Velocity vector imaging is a feasible and time-saving method for assessing left atrial volumes and ejection fraction, showing close agreement with conventional 2D echocardiography.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

VVI may expedite LA assessment; leaves open whether it improves diagnostic accuracy or outcomes versus 2DE.

Cite This Study

Valočík et al. (2010) studied this question.

synapsesocial.com/papers/6a70f2f735aa2c282ce247fb https://doi.org/10.1007/s10554-010-9619-y

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Velocity vector imaging to quantify left atrial function

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Velocity vector imaging to quantify left atrial function

Key Points

Structured PICO

Discussion

Implication

Cite This Study

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