Schwartz S L, Cao Q L, Vannan M A, Pandian N G
Department of Medicine, New England Medical Center, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
Am J Cardiol. 1996 Jun 15;77(15):1345-50. doi: 10.1016/s0002-9149(96)00203-2.
Assessment of regional wall motion by 2-dimensional echocardiography can be performed by either semiquantitative wall motion scoring or by quantitative analysis. The former is subjective and requires expertise. Quantitative methods are too time-consuming for routine use in a busy clinical laboratory. Color kinesis is a new algorithm utilizing acoustic backscatter analysis. It provides a color encoded map of endocardial motion in real time. In each frame a new color layer is added; the thickness of the color beam represents endocardial motion during that frame. The end-systolic image has multiple color layers, representing regional and temporal heterogeneity of segmental motion. The purpose of this study was to validate the use of color kinesis for semiquantitative analysis of regional left ventricular systolic function and quantitatively in measurement of endocardial excursion. Semiquantitative wall motion scoring was performed in 18 patients using both 2-dimensional echo and color kinesis. Scoring was identical in 74% of segments; there was 84% agreement in definition of normal vs. abnormal. There was less interobserver variability in wall motion scoring using color kinesis. Endocardial excursion was quantified in 21 patients. 70% of the imaged segments were suitable for analysis. Correlation between 2-dimensional echocardiographic measurements and color kinesis was excellent, r = 0.87. The mean difference in excursion as measured by the 2 methods was -0.05 +/- 2.0 mm. In conclusion, color kinesis is a useful method for assessing regional contraction by displaying a color map of systolic endocardial excursion. This algorithm may improve the confidence and accuracy of assessment of segmental ventricular function by echocardiographic methods.
二维超声心动图评估局部室壁运动可通过半定量室壁运动评分或定量分析来进行。前者具有主观性且需要专业知识。定量方法在繁忙的临床实验室中用于常规检查时过于耗时。彩色室壁运动技术是一种利用声学背散射分析的新算法。它能实时提供心内膜运动的彩色编码图。在每一帧中都会添加一个新的颜色层；色束的厚度代表该帧期间的心内膜运动。收缩末期图像有多个颜色层，代表节段性运动的局部和时间异质性。本研究的目的是验证彩色室壁运动技术用于左心室局部收缩功能半定量分析以及定量测量心内膜偏移的效用。对18例患者同时使用二维超声心动图和彩色室壁运动技术进行半定量室壁运动评分。74%的节段评分相同；在正常与异常的定义上有84%的一致性。使用彩色室壁运动技术进行室壁运动评分时观察者间的变异性较小。对21例患者的心内膜偏移进行了定量分析。70%的成像节段适合分析。二维超声心动图测量值与彩色室壁运动技术之间的相关性极佳，r = 0.87。两种方法测量的偏移平均差值为-0.05±2.0毫米。总之，彩色室壁运动技术通过显示收缩期心内膜偏移的彩色图是评估局部心肌收缩的一种有用方法。该算法可提高超声心动图方法评估节段性心室功能的可信度和准确性。
