Validation of 3D echocardiographic volume detection of left atrium by human cadaveric casts

Kuusisto, Jouni; Järvinen, Vesa; Sinisalo, Juha

doi:10.1186/s12880-018-0282-4

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…Thus, the axis of such a skewer was not explicit. Similar issues were faced in a previous study 16 and are to a degree a given property of the modality of ultrasound. We circumvented these types of issues, however, by using multiple types of phantoms and performing multiple measurements each.…”

Section: Reproducibility Of 4-chamber Deviation Measurementmentioning

confidence: 66%

“…In order to better mimic real cardiac tissue, we also constructed another set of nine phantoms made of 2.5% agar‐agar solution in water. This is the most widely used material for soft tissue substitution described in the literature 15 and has been effectively used for imaging cardiac casts with ultrasound 16 . In order to be able to accurately determine the LA‐LV angle of these phantoms while avoiding bias from using specific molds in a known exact angle, we cast the agar solution onto a level sheet and cut it into shapes made of two cuboids representing LA and LV, approximately 20 × 25 × 40 mm each in size, with a varying angle between these cuboids, which was then measured using a protractor, similar to the wooden phantoms.…”

Section: Methodsmentioning

confidence: 99%

“…We used a similar imaging protocol as described previously. 16 A GE Vivid E95 device with a 4Vc-D probe (GE Vingmed Ultrasound AS, Horten, Norway) was used for all imaging. The phantoms were immersed in a 20-l water tank for imaging.…”

Section: Ultrasound Imagingmentioning

confidence: 99%

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A method for measuring the angle between left atrial and left ventricular long axes using 3D echocardiography

Vekama,

Pirinen,

Järvinen

et al. 2023

Echocardiography

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BackgroundLeft ventricle (LV) optimized views are routinely used for left atrial (LA) volume and strain measurements on 2D echocardiography. This might be a source of the error because of the variation of the angle between the left atrial and left ventricle long axes (LA‐LV angle), leading to foreshortening of the LA.MethodsWe investigated two novel parameters: the angle between the left atrial and left ventricle long axes (LA‐LV angle) and its deviation from the 4‐chamber plane. To accurately measure the angles in 3D space, these measurements were performed using 3D echocardiography. We developed a method for the measurement based on marking anatomic points of reference in the 3D echocardiogram and measuring the angles between these points. We used three types of phantoms made of wood and agar‐agar to investigate the repeatability and reproducibility of these measurements and performed measurements on human subjects.ResultsThe ultrasound measurements were in excellent agreement with the true angles of the phantoms: LA‐LV angle bias was .5 degrees (95% CI −1.8 to +2.7) in the wooden phantoms and 1.2 degrees (−.7 to +3.1) in the agar‐agar phantoms, while the angle deviation from the 4‐chamber plane was −.9 degrees (−4.3 to +4.1) in the wooden phantoms and .0 degrees (−3.3 to +3.3) in the agar‐agar phantoms. The measurements demonstrated good repeatability and reproducibility (Pearson correlation coefficients ranging from .91 to .99). The measurements from human hearts showed good repeatability (Pearson correlation was .81 for repeated LA‐LV angle measurements and .97 for repeated measurements of the deviation from the 4‐chamber plane).ConclusionThe measurement of the LA‐LV angle is a feasible tool to investigate one eventual error of 2D echocardiography.

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Section: Reproducibility Of 4-chamber Deviation Measurementmentioning

confidence: 66%

Section: Methodsmentioning

confidence: 99%

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A method for measuring the angle between left atrial and left ventricular long axes using 3D echocardiography

Vekama,

Pirinen,

Järvinen

et al. 2023

Echocardiography

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“…All images and measurements were performed by a single operator using a standard protocol, according to guidelines of the European Association of Cardiovascular Imaging guidelines and recommendations of the American Society of Echocardiography. Three-dimensional volumetric evaluation was 3D MiniMuM Left AtriAL VoLuMe PreDicts AbLAtion outcoMe performed using the GE Echo PAC 4D LVQ software, that is designed for the left ventricle but can also be used for LA volumetry (6). We considered AF recurrence any episode of documented atrial tachyarrhythmia that lasted more than 30 seconds.…”

Section: S Tudy Designmentioning

confidence: 99%

Minimum Left Atrial Volume Evaluated by 3D Echocardiography Predicts Atrial Fibrillation Recurrences After a First Radiofrequency Catheter Ablation for Paroxysmal Episodes

Matei¹,

Ghilencea²,

Bejan³

et al. 2021

Maedica

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Background: Atrial fibrillation (AF) is facilitated by an enlarged left atrium (LA) and increased LA mass. Left atrium volume (LAV) has a powerful prognostic value for sinus rhythm (SR) maintenance. Persistent SR may lead to atrial reverse-remodeling; therefore, preprocedural LAV may predict the outcome after AF radiofrequency catheter ablation (RFCA).Study aim: To evaluate the relationship between LA dimensions and AF recurrences (AFR) using echocardiography.Methods: We enrolled 40 patients (56 ± 10 years; 73% males) who underwent a first RFCA for paroxysmal AF. Bi-(2DE) and three-dimensional (3DE) echocardiography was performed prior to RFCA and at 12-months follow-up. Rhythm control was monitored for up to two years after the intervention by periodic ECG Holter monitoring.Results: Atrial fibrillation recurrences were recorded in 21 patients (52%) in the first year after RCFA.

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“…A source of error is introduced as chamber morphology reflected in three-chamber view (3CH) is not appreciated. Accuracy of such LA volume calculation method and 3D volume measurement were studied in vitro by atrial cadaveric casts with cardiac ultrasound [ 10 ]. Typical CMR long axis images are oriented along LV long axis which usually is not parallel with true axis of LA [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Revisiting left atrial volumetry by magnetic resonance imaging: the role of atrial shape and 3D angle between left ventricular and left atrial axis

et al. 2021

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Background Accurate measurement of left atrial (LA) volumes is needed in cardiac diagnostics and the follow up of heart and valvular diseases. Geometrical assumptions with 2D methods for LA volume estimation contribute to volume misestimation. In this study, we test agreement of 3D and 2D methods of LA volume detection and explore contribution of 3D LA axis orientation and LA shape in introducing error in 2D methods by cardiovascular magnetic resonance imaging. Methods 30 patients with prior first-ever ischemic stroke and no known heart disease, and 30 healthy controls were enrolled (age 18–49) in a substudy of a prospective case–control study. All study subjects underwent cardiac magnetic resonance imaging and were pooled for this methodological study. LA volumes were calculated by biplane area-length method from both conventional long axis (LAVAL-LV) and LA long axis-oriented images (LAVAL-LA) and were compared to 3D segmented LA volume (LAVSAX) to assess accuracy of volume detection. 3D orientation of LA long axis to left ventricular (LV) long axis and to four-chamber plane were determined, and LA 3D sphericity indices were calculated to assess sources of error in LA volume calculation. Shapiro–Wilk test, Bland–Altman analysis, intraclass and Pearson correlation, and Spearman’s rho were used for statistical analysis. Results Biases were − 9.9 mL (− 12.5 to − 7.2) for LAVAL-LV and 13.4 (10.0–16.9) for LAVAL-LA [mean difference to LAVSAX (95% confidence interval)]. End-diastolic LA long axis 3D deviation angle to LV long axis was 28.3 ± 6.2° [mean ± SD] and LA long axis 3D rotation angle to four-chamber plane 20.5 ± 18.0°. 3D orientation of LA axis or 3D sphericity were not correlated to error in LA volume calculation. Conclusions Calculated LA volume accuracy did not improve by using LA long axis-oriented images for volume calculation in comparison to conventional method. We present novel data on LA axis orientation and a novel metric of LA sphericity and conclude that these measures cannot be utilized to assess error in LA volume calculation. Trial registration Main study Searching for Explanations for Cryptogenic Stroke in the Young: Revealing the Etiology, Triggers, and Outcome (SECRETO; NCT01934725) has been registered previously.

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Validation of 3D echocardiographic volume detection of left atrium by human cadaveric casts

Cited by 5 publications

References 23 publications

A method for measuring the angle between left atrial and left ventricular long axes using 3D echocardiography

A method for measuring the angle between left atrial and left ventricular long axes using 3D echocardiography

Minimum Left Atrial Volume Evaluated by 3D Echocardiography Predicts Atrial Fibrillation Recurrences After a First Radiofrequency Catheter Ablation for Paroxysmal Episodes

Revisiting left atrial volumetry by magnetic resonance imaging: the role of atrial shape and 3D angle between left ventricular and left atrial axis

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