Effects of frame rate on two-dimensional speckle tracking-derived measurements of myocardial deformation in premature infants.
Effects of frame rate on two-dimensional speckle tracking-derived measurements of myocardial deformation in premature infants.
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DOI：
10.1111/echo.12716
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发表时间：
2015-05
期刊：
影响因子：
--
通讯作者：
Singh GK
中科院分区：
文献类型：
--
作者：
Sanchez AA;Levy PT;Sekarski TJ;Hamvas A;Holland MR;Singh GK
图像采集的帧速率（FR）是二维斑点追踪超声心动图（2DSTE）心肌应变可靠性的重要决定因素。早产儿的心率（HR）相对较高。目的是分析不同FR对早产儿2DSE衍生的右心室（RV）和左心室（LV）纵向应变（LS）和应变率（LSR）再现性的影响。应用2DSTE在心尖四腔切面上测量20例早产儿（26 ± 1周）的右心室、左心室LS和LSR，HR为163 ± 13次/分。对于每个受试者，在FR <90、90-110、110-130和>130帧/秒时采集4组电影回放。两名观察员测量了LS和LSR。使用Bland Altman分析、变异系数和线性回归评估观察者间和观察者内重现性。在FR >110帧/秒时，RV和LV LS的观察者内再现性较高，在FR >130帧/秒时最佳。RV和LV LS的最高观察者间再现性分别为FR >130和> 110帧/秒。RV和LV收缩期和舒张早期LSR的最高再现性是在FR > 110帧/秒时。FR/HR比值>0.7帧/秒/次/分，可获得RV和LV变形成像的最佳再现性。早产儿二维超声心动图右室和左室变形成像的可靠性受图像采集的FR影响。当以0.7 - 0.9帧/秒/bpm之间的FR/HR比率获得电影循环时，再现性最稳健，这可能是最佳心肌斑点跟踪和机械事件定时的结果。
Frame rate (FR) of image acquisition is an important determinant of the reliability of 2-dimensional speckle tracking echocardiography (2DSTE)-derived myocardial strain. Premature infants have relatively high heart rates (HR). The aim was to analyze the effects of varying FR on the reproducibility of 2DSTE-derived right ventricle (RV) and left ventricle (LV) longitudinal strain (LS) and strain rate (LSR) in premature infants. RV and LV LS and LSR were measured by 2DSTE in the apical 4-chamber view in 20 premature infants (26 ± 1 weeks) with HR 163 ± 13 bpm. For each subject, 4 sets of cine-loops were acquired at FR of <90, 90-110, 110-130, and >130 frames/s. Two observers measured LS and LSR. Inter- and intra-observer reproducibility was assessed using Bland Altman analysis, coefficient of variation, and linear regression. Intra-observer reproducibility for RV and LV LS was higher at FR >110 frames/s, and optimum at FR >130 frames/s. The highest inter-observer reproducibility for RV and LV LS were at FR >130 and > 110 frames/s, respectively. The highest reproducibility for RV and LV systolic and early diastolic LSR was at FR > 110 frames/s. FR/HR ratio >0.7 frames/s/bpm yielded optimum reproducibility for RV and LV deformation imaging. The reliability of 2DSTE-derived RV and LV deformation imaging in premature infants is affected by the FR of image acquisition. Reproducibility is most robust when cine-loops are obtained with FR/HR ratio between 0.7 – 0.9 frames/s/bpm, which likely results from optimal myocardial speckle tracking and mechanical event timing.
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DOI：
10.5402/2012/753481
发表时间：
2012
期刊：
ISRN pediatrics
影响因子：
--
作者：
Koestenberger M
通讯作者：
Koestenberger M
影响因子：
--
作者：
Mor-Avi, Victor;Lang, Roberto M.;Zamorano, Jose Luis
通讯作者：
Zamorano, Jose Luis
影响因子：
2.7
作者：
KOOPMANS, LH;OWEN, DB;ROSENBLATT, JI
通讯作者：
ROSENBLATT, JI
影响因子：
2.8
作者：
Di Salvo, Giovanni;Rea, Alessandra;Russo, Maria Giovanna
通讯作者：
Russo, Maria Giovanna
DOI：
10.1016/j.echo.2012.01.011
发表时间：
2012-05-01
影响因子：
6.5
作者：
Blanc, Julie;Stos, Bertrand;Boudjemline, Younes
通讯作者：
Boudjemline, Younes