Quantitative evaluation of left atrial volumes and ejection fraction by 320-slice computed-tomography in comparison with three- and two-dimensional echocardiography: A single-center retrospective-study in 22 subjects

Kataoka, Akihisa; Funabashi, Nobusada; Takahashi, Atsuo; Yajima, Rei; Takahashi, Maiko; Uehara, Masae; Takaoka, Hiroyuki; Saito, Mariko; Yamaguchi, Chiharu; Lee, Kwang-Ho; Nomura, Fumio; Komuro, Issei

doi:10.1016/j.ijcard.2010.08.036

Cited by 31 publications

(17 citation statements)

References 44 publications

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“…Our findings are consistent with previous studies that have demonstrated good correlation between CT and 2DTTE calculated LAVol, but a systematic underestimation of LAVol by 2DTTE . Similarly, the underestimation of LAVol by echocardiography has also been previously demonstrated when compared to cardiac magnetic resonance imaging (MRI), while LAVol measured with cardiac MRI correlates well with LAVol by CT …”

Section: Discussionsupporting

confidence: 92%

Validation of Two‐Dimensional Methods for Left Atrial Volume Measurement: A Comparison of Echocardiography with Cardiac Computed Tomography

et al. 2013

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Section: Discussionsupporting

confidence: 92%

Validation of Two‐Dimensional Methods for Left Atrial Volume Measurement: A Comparison of Echocardiography with Cardiac Computed Tomography

et al. 2013

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“…More novel 320-slice CT scanners visualize the boundaries of the LA with more advanced spatial resolution, comparable to 1.5-tesla MRI [32], [33]. In a study comparing 320-slice cCT and transthoracic 2D and 3D echocardiography (TTE), the methods showed a strong positive correlation, but the absolute value of the LA volume on cCT was significantly larger than that determined by either 3D or 2D TTE, which can be due to an overestimation by cCT, underestimation by TTE, or both [34]. LAA morphology is widely used for the pre-evaluation of percutaneous LAA closure procedures [35].…”

Section: Discussionmentioning

confidence: 99%

Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

et al. 2014

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ObjectivesLeft atrial appendage (LAA) dilatation and morphology may influence an individual's risk for intracardiac thrombi and ischemic stroke. LAA size and morphology can be evaluated using cardiac computed tomography (cCT). The present study evaluated the reproducibility of LAA volume and morphology assessments.MethodsA total of 149 patients (47 females; mean age 60.9±10.6 years) with suspected cardioembolic stroke/transient ischemic attack underwent cCT. Image quality was rated based on four categories. Ten patients were selected from each image quality category (N = 40) for volumetric reproducibility analysis by two individual readers. LAA and left atrium (LA) volume were measured in both two-chamber (2CV) and transversal view (TV) orientation. Intertechnique reproducibility was assessed between 2CV and TV (200 measurement pairs). LAA morphology (A = Cactus, B = ChickenWing, C = WindSock, D = CauliFlower), LAA opening height, number of LAA lobes, trabeculation, and orientation of the LAA tip was analysed in all study subjects by three individual readers (447 interobserver measurement pairs). The reproducibility of volume measurements was assessed by intra-class correlation (ICC) and the reproducibility of LAA morphology assessments by Cohen's kappa.ResultsThe intra-observer and interobserver reproducibility of LAA and LA volume measurements was excellent (ICCs>0.9). The LAA (ICC = 0.954) and LA (ICC = 0.945) volume measurements were comparable between 2CV and TV. Morphological classification (ĸ = 0.24) and assessments of LAA opening height (ĸ = 0.1), number of LAA lobes (ĸ = 0.16), trabeculation (ĸ = 0.15), and orientation of the LAA tip (ĸ = 0.37) was only slightly to fairly reproducible.ConclusionsLA and LAA volume measurements on cCT provide excellent reproducibility, whereas visual assessment of LAA morphological features is challenging and results in unsatisfactory agreement between readers.

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“…Multidetector CT-derived left atrial volume has correlated well with CMR [27]. The advantages of CT are the direct measurement of the left atrium without geometric assumptions, with high reproducibility [63] and assessment of dynamic left atrial volume changes by time curves [27]. Furthermore, the use of fixed phase analysis [64] and 320-slice CT measurement of left atrial volumes has recently been demonstrated even in atrial fibrillation, with excellent correlation to CMR [30 & ].…”

Section: Cardiac Computed Tomographymentioning

confidence: 99%

Left atrial volumes

Boyd

Thomas

2014

Current Opinion in Cardiology

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The different imaging modalities used to assess left atrial volumes are not interchangeable, particularly for serial measurements. Although 2DE underestimates left atrial volumes, most normative as well as predictive data have been obtained using this modality. Standardization, with established normative data and classification criteria, needs to be established for other imaging modalities, additionally incorporating assessment of left atrial minimum and phasic volumes. Despite the limitations of the more simplistic 2DE, its measurements are well defined with significant prognostic value. The incremental prognostic value of the more complex imaging techniques needs to be further validated.

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Quantitative evaluation of left atrial volumes and ejection fraction by 320-slice computed-tomography in comparison with three- and two-dimensional echocardiography: A single-center retrospective-study in 22 subjects

Cited by 31 publications

References 44 publications

Validation of Two‐Dimensional Methods for Left Atrial Volume Measurement: A Comparison of Echocardiography with Cardiac Computed Tomography

Validation of Two‐Dimensional Methods for Left Atrial Volume Measurement: A Comparison of Echocardiography with Cardiac Computed Tomography

Morphological and Volumetric Analysis of Left Atrial Appendage and Left Atrium: Cardiac Computed Tomography-Based Reproducibility Assessment

Left atrial volumes

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