腿部抬高时采用二维斑点追踪超声心动图评估右心室的整体纵向应变和节段应变。
Evaluation of the global longitudinal strain and segmental strain of the right ventricle with two-dimensional speckle-tracking echocardiography with elevation of the legs.
作者信息
García-López Zaira Y, Vargas-Barrón Jesús
机构信息
Department of Hospitalization, High Specialty Medical Unit, Cardiology Hospital, Centro Médico Nacional Siglo XXI, IMSS.
Department of Echocardiography, Instituto Nacional de Cardiología Dr. Ignacio Chávez. Mexico City, Mexico.
出版信息
Arch Cardiol Mex. 2019;89(1):15-19. doi: 10.24875/ACME.M19000003.
INTRODUCTION
Speckle-tracking echocardiography has shown its usefulness in the evaluation of the right ventricle (RV) in healthy subjects and in pulmonary hypertension. It is unknown whether this technique could be sensitive to assess healthy RV with increases in preload.
METHODS
Consecutive subjects were studied without evidence of cardiopulmonary disease. They underwent speckle-tracking echocardiography in General Electric Vivid 7 equipment. The "segmental longitudinal strain" (SLS) and "global longitudinal strain" (GLS) of the RV was determined at rest and with an increase in the preload through elevation the legs to 45°.
RESULTS
We analyzed 31 subjects, 16 men and 15 women, aged 16-53 years, in which were measured SLS and GLS. Basal of the RV free wall: -29.1 ± 3.3 versus -32.7 ± 5.5%, p = 0.0002. Mid of the RV free wall: -28.6 ± 6.4 versus -31.5 ± 4.9 %, p = 0.001. Apical of the free wall of the RV: -21.9 ± 6.5 versus -23.3 ± 6.1 %, p = 0.118. Basal inferoseptum: -19.40 ± 3.2 versus -18.9 ± 3.0 %, p = 0.204. Mid inferoseptum: -19.3 ± 3.2 versus -19 ± 3.1 %, p = 0.249. Apical septum: -17.1 ± 5.1 versus -17 ± 5.4 %, p = 0.457. GLS of the RV: -23.06 ± 3.4 versus -24.5 ± 2.9 %, p = 0.002. ICC: 0.773, 95 % CI: 0.534-0.890, p < 0.001.
CONCLUSIONS
This method was sensitive to detect differences in the GLS and SLS basal and mid of the RV free wall.
引言
斑点追踪超声心动图已显示出其在评估健康受试者及肺动脉高压患者右心室（RV）方面的作用。尚不清楚该技术在评估前负荷增加时的健康右心室是否敏感。
方法
对无心肺疾病证据的连续受试者进行研究。他们使用通用电气Vivid 7设备接受斑点追踪超声心动图检查。在静息状态下以及通过将双腿抬高至45°增加前负荷时，测定右心室的“节段纵向应变”（SLS）和“整体纵向应变”（GLS）。
结果
我们分析了31名受试者，其中16名男性和15名女性，年龄在16 - 53岁，测量了他们的SLS和GLS。右心室游离壁基底：-29.1±3.3%对-32.7±5.5%，p = 0.0002。右心室游离壁中部：-28.6±6.4%对-31.5±4.9%，p = 0.001。右心室游离壁心尖：-21.9±6.5%对-23.3±6.1%，p = 0.118。基底下间隔：-19.40±3.2%对-18.9±3.0%，p = 0.204。中间下间隔：-19.3±3.2%对-19±3.1%，p = 0.249。右心室间隔心尖：-17.1±5.1%对-17±5.4%，p = 0.457。右心室GLS：-23.06±3.4%对-24.5±2.9%，p = 0.002。组内相关系数（ICC）：0.773，95%置信区间（CI）：0.534 - 0.890，p < 0.001。
结论
该方法对检测右心室游离壁基底和中部的GLS及SLS差异敏感。
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