Automated Assessment of Mitral Regurgitant Volume and Regurgitant Fraction by a Newly Developed Digital Color Doppler Velocity Profile Integration Method

Hozumi, Takeshi; Yoshida, Kiyoshi; Takagi, Tsutomu; Yamamuro, Atsushi; Yagi, Toshikazu; Yoshikawa, Junichi

doi:10.1016/s0002-9149(97)00673-5

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…[4][5][6][7][8][9][10] It has been reported that flow volume determined by the ACM algorithm shows good agreement with that measured by flowmeter in experimental studies. 4 Recent reports have shown good correlations between ACM and clinically accepted techniques such as the thermodilution method for estimating aortic outflow volume in the clinical situation.…”

Section: Estimation Of the Qp/qs Ratio By Acm Methodsmentioning

confidence: 58%

“…The newly developed automated cardiac flow measurement (ACM) method, using spatial and temporal integration of colour Doppler velocity profiles, provides an accurate and quick automated flow volume measurement without the limitations inherent in pulsed Doppler echocardiography. [4][5][6][7][8][9] This new method has recently been validated for the calculation of the Qp/Qs ratio by measurement of both left and right ventricular stroke volumes in an animal study. 10 To our knowledge, however, there have been no reports of the application of ACM for determining the Qp/Qs ratio in patients with atrial septal defects.…”

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confidence: 99%

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Non-invasive automated assessment of the ratio of pulmonary to systemic flow in patients with atrial septal defects by the colour Doppler velocity profile integration method

Ueda¹

2002

Heart

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Background: The recent introduction of the automated cardiac flow measurement (ACM) method, using spatiotemporal integration of the Doppler velocity profile, provides a quick and accurate automated calculation of cardiac output. Objective: To evaluate the ACM method against oximetry during cardiac catheterisation for estimating the Qp/Qs (pulmonary to systemic flow) ratio in patients with an atrial septal defect. Methods: Left and right ventricular stroke volume (LVSV, RVSV) were calculated by ACM in 22 patients with an atrial septal defect who underwent cardiac catheterisation and in 11 patients without heart disease (control group). With ACM, the Qp/Qs ratio was estimated from RVSV divided by LVSV. In the patients with an atrial septal defect, the Qp/Qs ratio was assessed by oximetry at the time of cardiac catheterisation.Results: There was a good correlation between LVSV and RVSV obtained by ACM in the control group (r = 0.98, y = 0.97x + 0.25, SEE = 2.9 ml). The mean difference between LVSV and RVSV by ACM was −1.25 (2.76) ml. The Qp/Qs ratio obtained by ACM in the control group was 0.98 (0.06). The Qp/Qs ratio in patients with an atrial septal defect was significantly higher than in the control group Conclusions:The newly developed ACM method is clinically useful for non-invasive automated estimations of the Qp/Qs ratio in patients with an atrial septal defect.

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Section: Estimation Of the Qp/qs Ratio By Acm Methodsmentioning

confidence: 58%

mentioning

confidence: 99%

Non-invasive automated assessment of the ratio of pulmonary to systemic flow in patients with atrial septal defects by the colour Doppler velocity profile integration method

Ueda¹

2002

Heart

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“…[16][17][18][19][20][21] Colour Doppler echocardiography was undertaken with a Toshiba SSA-380A ultrasound imaging system equipped with prototype ACM software and a 2.5 MHz transducer. Frame rate was set at 27 frames/s with a 30°colour sector.…”

Section: Acm Methodsmentioning

confidence: 99%

Automated quantification of aortic regurgitant volume and regurgitant fraction using the digital colour Doppler velocity profile integration method in patients with aortic regurgitation

Miyake

2002

Heart

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Background:The recently introduced automated cardiac flow measurement (ACM) technique provides a quick and an accurate automated calculation of stroke volume and cardiac output. This is obtained by spatio-temporal integration of digital Doppler velocity profile data. Results: Aortic regurgitant volumes measured by the ACM method showed a good correlation with the PD-2D measurements (r = 0.95, y = 0.9x + 3.9, SEE = 8.6 ml); the mean (SD) difference between the two methods was −1.5 (8.5) ml. %RF estimated by the ACM method also correlated well with the values obtained by the PD-2D method (r = 0.91, y = 0.9x + 4.9, SEE = 6.0%); the mean difference between the two methods was −1.5 (6.0)%. Total time required for aortic regurgitant volume (for one cardiac cycle) by the ACM method was significantly shorter than by the PD-2D method (130 (16) v 230 (32) s, p < 0.01). Conclusions: The newly developed the ACM method is quick and accurate in the automated assessment of aortic regurgitant volume and per cent regurgitant fraction in patients with isolated aortic regurgitation.

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“…One of the two-dimensional techniques, the automated cardiac output measurement method, involves positioning a rectangular region of interest in the flow while scanning parallel to the direction of flow [28][29][30][31] . The velocities within the selected region are integrated on a frame to frame basis to compute spatial and temporal flow profiles and generate flow volume data.…”

Section: Other Digital Colour Doppler Techniquesmentioning

confidence: 99%

Surface Integration of Velocity Vectors from 3D Digital Colour Doppler: An Angle Independent Method for Laminar Flow Measurements

Rusk¹

2002

European Journal of Echocardiography

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Automated Assessment of Mitral Regurgitant Volume and Regurgitant Fraction by a Newly Developed Digital Color Doppler Velocity Profile Integration Method

Cited by 15 publications

References 12 publications

Non-invasive automated assessment of the ratio of pulmonary to systemic flow in patients with atrial septal defects by the colour Doppler velocity profile integration method

Non-invasive automated assessment of the ratio of pulmonary to systemic flow in patients with atrial septal defects by the colour Doppler velocity profile integration method

Automated quantification of aortic regurgitant volume and regurgitant fraction using the digital colour Doppler velocity profile integration method in patients with aortic regurgitation

Surface Integration of Velocity Vectors from 3D Digital Colour Doppler: An Angle Independent Method for Laminar Flow Measurements

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