Quantitative assessment of velocities of the annulus of the left atrioventricular valve and left ventricular free wall in healthy cats by use of two-dimensional color tissue Doppler imaging
Quantitative assessment of velocities of the annulus of the left atrioventricular valve and left ventricular free wall in healthy cats by use of two-dimensional color tissue Doppler imaging
复制标题
DOI：
10.2460/ajvr.67.2.250
复制
发表时间：
2006-02-01
影响因子：
1
通讯作者：
Nicolle, AP
中科院分区：
文献类型：
--
作者：
Chetboul, V;Sampedrano, CC;Nicolle, AP
目的：应用二维彩色组织多普勒成像（TDI）技术，对大量健康猫的左房室瓣环和左心室游离壁（LVFW）的运动速度进行分析。（0.3至12.0岁;体重1.0 ~ 8.0kg）。程序-记录心内膜和心外膜段的径向心肌速度，结果LVFW速度在心内膜层显著高于心外膜层，在左室基底段显著高于心尖段。对于收缩期、舒张早期和舒张晚期，平均SD径向心肌速度梯度（MVG）（定义为心内膜和心外膜速度之间的差异）分别为2.2 +/- 0.7、3.3 +/- 1.3和1.8 +/- 0.7 cm/s，纵向MVG（定义为基底和心尖速度之间的差异），分别为2.7 +/- 0.8、3.1 +/- 1.4和2.1 +/- 0.9 cm/s。记录了几个TDI变量的品种效应;因此，确定了2个主要品种（缅因州浣熊和国内短毛猫）的TDI变量的参考区间。结论和临床相关性-健康猫的LVFW速度从心内膜到心外膜和从基部到心尖减少，从而定义径向和纵向MVG。这些指标可以补充传统的左心室功能的分析，有助于早期准确地检测心肌病在猫。
Objective-To analyze velocities of the annulus of the left atrioventricular valve and left ventricular free wall (LVFW) in a large population of healthy cats by use of 2-dimensional color tissue Doppler imaging (TDI).Animals-100 healthy cats (0.3 to 12.0 years old; weighing 1.0 to 8.0 kg) of 6 breeds.Procedure-Radial myocardial velocities were recorded in an endocardial and epicardial segment, and longitudinal velocities were recorded in 2 LVFW segments (basal and apical) and in the annulus of the left atrioventricular valve.Results-LVFW velocities were significantly higher in the endocardial than epicardial layers and significantly higher in the basal than apical segments. For systole, early diastole, and late diastole, mean SD radial myocardial velocity gradient (MVG), which was defined as the difference between enDocardial and epicardial velocities, was 2.2 +/- 0.7, 3.3 +/- 1.3, and 1.8 +/- 0.7 cm/s, respectively, and longitudinal MVG, which was defined as the difference between basal and apical velocities, was 2.7 +/- 0.8, 3.1 +/- 1.4, and 2.1 +/- 0.9 cm/s, respectively. A breed effect was documented for several TDI variables; therefore, reference intervals for the TDI variables were determined for the 2 predominant breeds represented (Maine Coon and domestic shorthair cats).Conclusions and Clinical Relevance-LVFW velocities in healthy cats decrease from the endocardium to the epicardium and from the base to apex, thus defining radial and longitudinal MVG. These indices could complement conventional analysis of left ventricular function and contribute to the early accurate detection of cardiomyopathy in cats.