Color Doppler velocity accuracy proximal to regurgitant orifices: influence of orifice aspect ratio

Myers, Jerry G.; Elmahdi, Abdelaziz M.; Perry, Gilbert J.; Fan, Pohoey; Nanda, Navin C.

doi:10.1016/s0301-5629(99)00023-x

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…However, Perry et al 43 showed that wall lter settings are not the sole factor contributing to velocity accuracy, but that spatial beam expansion characteristics must also be considered. Myers et al 44 reported that in small orices, velocity errors are higher in velocities close to the ori ce and the ori ce aspect ratio will have more effect on velocity errors. Anayiotos et al 4 5 have shown that a 3-D echo provides information on the ori ce geometry and size.…”

Section: Figure 3 a The Regression Analysis Between The Qp-qs P Is mentioning

confidence: 99%

Proximal Isovelocity Surface Area (PISA) as a Noninvasive Method for the Estimation of the Shunt Quantification in Perimembranous Ventricular Septal Defects

et al. 2001

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This study was designed to assess the reliability of the proximal isovelocity surface area (PISA) method for the estimation of shunt quantification in perimembranous ventricular septal defects (PVSD). The study group was composed of 30 patients (age 11 +/- 7 years, 13 female) with PVSD. The shunt flow (Qp-Qs) and the ratio of the pulmonary flow to the systemic flow (Qp/Qs) were calculated by spectral Doppler and catheterization. The Qp-Qs, the defect area (DA), and the shunt volume (SV) were obtained by the PISA method. The PISA method estimated the DA (cm(2)/m(2)), the SV (cm(3)/m(2)), and the Qp-Qs (L/min/m(2)) to be equal to (2 x pi x R(2) x NL)/(V(max) x Body surface area), DA x TVI(shunt), and to SV x Heart rate, respectively (R is the distance of the maximal PISA from the first aliasing line to the left ventricular side of the defect, NL is the nyquist limit, and V(max) and TVI(shunt) are the peak velocity and time-velocity integral of transdefect Doppler tracing obtained by continuous-wave Doppler). The PISA method (3.4 +/- 1.5 L/min/m(2)) underestimated the Qp-Qs according to spectral Doppler (r = 0.96, P < 0.001; mean difference -0.74 +/- 0.61 L/min/m(2); SEE = 0.11 L/min/m(2), P < 0.001) and catheterization (r = 0.92, P < 0.001; mean difference -0.45 +/- 0.7 L/min/m(2); SEE = 0.13 L/min/m(2), P < 0.001). The correlations between the PISA findings (Qp-Qs, DA, SV) and the catheterization Qp/Qs (r = 0.86, 0.84, and 0.86; P < 0.001, respectively), or between these and the spectral Doppler Qp/Qs (r = 0.80, 0.80, and 0.79; P < 0.001, respectively) were significant. The accuracies of the PISA findings in identifying large defects were high (0.90, 0.93, and 0.90 for cut-off values of Qp-Qs = 3.67 L/min/m(2), DA = 0.44 cm(2)/m(2), and SV = 43 cm(3)/m(2), respectively). As a result, the PISA method can be a simple and reliable alternative to the spectral Doppler method in the identification of large shunts in PVSD.

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Section: Figure 3 a The Regression Analysis Between The Qp-qs P Is mentioning

confidence: 99%

Proximal Isovelocity Surface Area (PISA) as a Noninvasive Method for the Estimation of the Shunt Quantification in Perimembranous Ventricular Septal Defects

et al. 2001

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Real-time 3-dimensional echocardiography for quantification of the difference in left ventricular versus right ventricular stroke volume in a chronic animal model study: Improved results using C-scans for quantifying aortic regurgitation

Jones

Irvine

et al. 2004

Journal of the American Society of Echocardiography

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Proximal Flow Convergence Region as Assessed by Real-time 3-Dimensional Echocardiography: Challenging the Hemispheric Assumption

Yosefy

Levine

Solı́s

et al. 2007

Journal of the American Society of Echocardiography

136

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Color Doppler velocity accuracy proximal to regurgitant orifices: influence of orifice aspect ratio

Cited by 4 publications

References 28 publications

Proximal Isovelocity Surface Area (PISA) as a Noninvasive Method for the Estimation of the Shunt Quantification in Perimembranous Ventricular Septal Defects

Proximal Isovelocity Surface Area (PISA) as a Noninvasive Method for the Estimation of the Shunt Quantification in Perimembranous Ventricular Septal Defects

Real-time 3-dimensional echocardiography for quantification of the difference in left ventricular versus right ventricular stroke volume in a chronic animal model study: Improved results using C-scans for quantifying aortic regurgitation

Proximal Flow Convergence Region as Assessed by Real-time 3-Dimensional Echocardiography: Challenging the Hemispheric Assumption

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