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利用二维彩色组织多普勒成像技术对健康猫左房室瓣环和左心室游离壁速度进行定量评估。

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.

作者信息

Chetboul Valerie, Sampedrano Carolina Carlos, Tissier Renaud, Gouni Vassiliki, Saponaro Vittorio, Nicolle Audrey P, Pouchelon Jean-Louis

机构信息

Cardiology Unit of Alfort, National Veterinary School of Alfort, 7 Avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France.

出版信息

Am J Vet Res. 2006 Feb;67(2):250-8. doi: 10.2460/ajvr.67.2.250.

Abstract

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.

摘要

目的

通过二维彩色组织多普勒成像(TDI)分析大量健康猫左房室瓣环和左心室游离壁(LVFW)的速度。

动物

6个品种的100只健康猫(0.3至12.0岁;体重1.0至8.0千克)。

方法

记录心内膜和心外膜段的径向心肌速度,以及2个LVFW段(基底段和心尖段)和左房室瓣环的纵向速度。

结果

LVFW速度在心内膜层显著高于心外膜层,在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±标准差径向心肌速度梯度(MVG)(定义为心内膜和心外膜速度之差)分别为2.2±0.7、3.3±1.3和1.8±0.7厘米/秒,纵向MVG(定义为基底段和心尖段速度之差)分别为2.7±0.8、3.1±1.4和2.1±0.9厘米/秒。记录到几种TDI变量存在品种效应;因此,为所代表的2个主要品种(缅因库恩猫和家养短毛猫)确定了TDI变量的参考区间。

结论及临床意义

健康猫的LVFW速度从心内膜到心外膜以及从基底到心尖逐渐降低,从而确定了径向和纵向MVG。这些指标可补充左心室功能的传统分析,并有助于早期准确检测猫的心肌病。

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