Key result
Velocity vector imaging analysis for quantitative assessment of global and regional right ventricular function during stress echocardiography was feasible in 96% of cases.
Why the study?
Is velocity vector imaging feasible for quantitatively assessing right ventricular function during stress echocardiography?
Observational (n=73)
Is velocity vector imaging feasible for quantitatively assessing right ventricular function during stress echocardiography?
Velocity vector imaging is highly feasible for quantitatively assessing global and regional right ventricular function during stress echocardiography, with longitudinal velocity and strain rate being the best indicators of RV response.
Supports velocity vector imaging for RV assessment in stress echocardiography research; prospective validation needed before clinical adoption.
AIMS: This study tested the feasibility of velocity vector imaging (VVI) analysis to quantitatively assess right ventricular (RV) function during stress echocardiography (SE). METHODS AND RESULTS: We prospectively enrolled 73 patients (treadmill 38, dobutamine 35) undergoing SE using an Acuson C512 ultrasound system. The RV ejection fraction was measured for global RV function. The radial velocity, circumferential strain, and strain rate (SR) of four segments from the mid-level RV short-axis view, and the longitudinal velocity, strain, and SR of six segments from the RV apical four-chamber view were used to evaluate regional RV function. The VVI analysis successfully in 70 of 73 cases (96%). Fifty (71%) of the 70 demonstrated a normal response to stress, showing an increased RV ejection fraction (P < 0.001), and longitudinal velocity and SR in the basal lateral walls at peak stress (7.7 +/- 2.0-10.3 +/- 2.9 cm/s, -1.9 +/- 0.7 to -3.2 +/- 1.4/s, P < 0.001); the longitudinal displacement and strain of the same segment did not show a significant increase. CONCLUSION: Quantitative assessment of global and regional RV function during SE was feasible using VVI analysis. Longitudinal velocity and SR of the RV basal lateral wall were significantly better than longitudinal displacement or strain for detecting RV response during SE.
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Yang et al. (2009) conducted an observational in Patients undergoing stress echocardiography (n=73). Velocity vector imaging (VVI) analysis was evaluated on Feasibility of VVI analysis to quantitatively assess right ventricular function. Velocity vector imaging analysis for quantitative assessment of global and regional right ventricular function during stress echocardiography was feasible in 96% of cases.
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