Investigation of human right ventricular cast specimens

Dübel, Hans-Peter; Romaniuk, P; Tschapek, A

doi:10.1007/bf02552801

Cited by 12 publications

(2 citation statements)

References 12 publications

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“…The small difference of accuracy between multiple slice and area length models with different regressions is not significant, however, and may not be relevant for clinical purposes. Though the mean accuracy of the frontal lateral models is within the expected range [13,18,19], the performance of all models is limited due to the occurrence of outliers reflected by rather large whiskers in the box-plots. Two severe outliers demonstrate the principal limitations of the method.…”

Section: Performance Of Modelsmentioning

confidence: 98%

Evaluation of New Software for Angiographic Determination of Right Ventricular Volumes

Wellnhofer¹,

Ewert

Hug³

et al. 2005

Int J Cardiovasc Imaging

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Section: Performance Of Modelsmentioning

confidence: 98%

Evaluation of New Software for Angiographic Determination of Right Ventricular Volumes

Wellnhofer¹,

Ewert

Hug³

et al. 2005

Int J Cardiovasc Imaging

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“…Our cast studies showed that in addition to the established BiPL PA/LAT and RAOI LAO right ventricular volumetric methods [2][3][4][5][6][7]35,36] the BiPL calculations in the two axial projections [long axial and HCL) also gave very good correlations. Consequently, in patients studied for ventricular septa1 defects, endocardia1 cushion defects, D-transposition of the great arteries, etc, RVV may be obtained from these newer angiographic projections without the need for additional "standard" contrast studies.…”

Section: Discussionmentioning

confidence: 81%

Single versus biplane right and left ventricular volumetry: A cast and clinical study

Formanek

Schey

Ekstrand

et al. 1984

Cathet. Cardiovasc. Diagn.

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True volume (y) and measured volume (x) determined from 23 right and 22 left normal human casts in four biplane angiographic positions and in their eight single-plane components were used to find the correction factor (b) by regression through the origin (y = bx). The correction factors were applied to human studies to assess the validity of the various biplane and single-plane modalities in vivo. The casts studies yield excellent correlations in both right and left biplane methods (right volumetry: 0.555 less than or equal to b less than or equal to 0.708, 0.917 less than or equal to r less than or equal to 0.954, 4.10 less than or equal to SEE less than or equal to 6.01 left volumetry: 0.748 less than or equal to b less than or equal to 0.825, 0.974 less than or equal to r less than or equal to 0.982, 4.81 less than or equal to SEE 5.79). Good results were obtained with single-plane volumetries as well (right volumetry: 0.316 less than or equal to b less than or equal to 0.887, 0.750 less than or equal to r less than or equal to 0.917, 10.75 less than or equal to SEE less than or equal to 18.96; left volumetry: 0.728 less than or equal to b less than or equal to 0.881, 0.897 less than or equal to r less than or equal to 0.976 5.73 less than or equal to SEE less than or equal to 11.97). The correction factors for the single-plane studies depend much more strongly on the spatial position relative to the radiographic system, particularly in the case of the right ventricular volumes. Thus, the application of the appropriate correction factors is mandatory. The human studies (141 left and 60 right volumetric studies in various single-plane and biplane projections) showed a larger scatter of single-plane values, more pronounced for the right ventricle. In certain disease conditions, single plane volumetric studies using cast-derived correction factors cannot be used to obtain meaningful results. Correction factors for the following single or biplane mode volumetry are presented for the first time: biplane hepatoclavicular view (right and left ventricle), biplane long axial oblique view (right ventricle), and their single-plane components; lateral and 60 degree Left Anterior Oblique (LAO) single plane for the left-sided measurements, Postero-Anterior (PA), lateral, and 60 degree LAO for the single-plane right-sided calculations.

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Right ventricular volume determination in isolated human hearts

Erbel

Richter

Krebs

et al. 1986

J of Clinical Ultrasound

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For right ventricular volume determination a new method was developed that took into account right ventricular imaging by apical two-dimensional echocardiography in the four- and two-chamber views. Right ventricular volume was calculated by subtraction of the partial volume of the left ventricle and interventricular septum from the total heart volume of the right and left ventricles including the interventricular septum. Accuracy of the subtraction method was evaluated in isolated human hearts by two-dimensional echocardiography and radiography. Regression analysis indicated that for both the echocardiographic and radiologic procedures, the subtraction method gave the best correlation with the right ventricular filling volume. The correlation coefficients obtained using the echocardiographic procedure were 0.964, 0.848, and 0.851 for the subtraction method, pyramid method, and Simpson's rule method, respectively. For the radiographic procedure, these values were 0.946, 0.860, and 0.872. Percentage difference calculations indicated that the subtraction method systematically underestimated (-7.4%) the filling volume in the echocardiographic procedure, but this was not seen with the radiologic procedures. The random error associated with the subtraction method was only half (10.5%, 13.9%) of that seen with the other two methods in both the echocardiographic and radiological procedures. These results indicate that right ventricular volume determination by the subtraction method seems to be suitable for apical two-dimensional echocardiography and is more accurate than the pyramid method and Simpson's rule method.

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Investigation of human right ventricular cast specimens

Cited by 12 publications

References 12 publications

Evaluation of New Software for Angiographic Determination of Right Ventricular Volumes

Evaluation of New Software for Angiographic Determination of Right Ventricular Volumes

Single versus biplane right and left ventricular volumetry: A cast and clinical study

Right ventricular volume determination in isolated human hearts

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