应变率成像技术评价正常左室壁等容舒张

宋艳; 钱蕴秋; 张海滨; 李红玲; 刘丽文; 郑敏娟; 崔凯

中国临床医学影像杂志 ›› 2006, Vol. 17 ›› Issue (10) : 563-565.

论著

应变率成像技术评价正常左室壁等容舒张

宋艳,钱蕴秋,张海滨,李红玲,刘丽文,郑敏娟,崔凯

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Characteristics of left ventricular strain rate imaging during isovolumic relaxation period in normal subjects

SONG Yan, QIAN Yun-qiu, ZHANG Hai-bin, LI Hong-ling, LIU Li-wen, ZHENG Min-juan, CUI Kai

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摘要

目的:应用应变率成像(SRI)技术研究正常人等容舒张期左室壁纵向应变率。方法:记录健康人左室各室壁、各水平纵向应变率曲线,测量等容舒张期正向、负向应变率的峰值SRIVR+、SRIVR-,分别用舒张早期和收缩期峰值应变率SRE和SRS校正,即SRIVR+/SRE、SRIVR-/SRS,测量等容舒张期时相指标,比较各室壁、各水平之间的差异。结果:正常心脏等容舒张期纵向应变率曲线有4种形式;SRIVR+与年龄显著相关,从基底向心尖递减,各室壁间无显著性差异;SRIVR-各室壁间以室间隔为大,从基底向心尖递减,心尖部SRIVR-与年龄显著相关。结论:SRI可定量分析正常人等容舒张期心肌形变,为研究病变心肌等容舒张期变化提供依据。

Abstract

Objective: To investigate longitudinal strain rate during isovolumic relaxation period of left ventricle(LV) in normal subjects by strain rate imaging(SRI). Methods: The LV wall was divided into six walls and each wall into three segments. SR-Time waves were observed. Both positive and negative peak strain rate in isovolumic relaxation period were measured(SRIVR+, SRIVR-). They were corrected by peak strain rate of systolic and early relaxation period respectively(SRIVR+/SRE, SRIVR-/SRS). Time data were also measured. All the parameters were compared among different walls and segments. Results: There were four modes of movement during isovolumic relaxation period. Most segments relaxed. There’s no significant difference in SRIVR+ among walls, while from basal to apical level, SRIVR+ decreased. SRIVR+ correlated well with age. Other segments had contracting waves. SRIVR- was larger in interventricular septal walls. From basal to apical level, SRIVR- also decreased. SRIVR- in apical level correlated with age significantly. Conclusions: Relaxation and contraction of LV wall in normal subjects during isovolumic relaxation period can be quantitatively evaluated by SRI, which may be the base of further study on dysfunctional myocardium.

导出引用

宋艳;钱蕴秋;张海滨;李红玲;刘丽文;郑敏娟;崔凯. 应变率成像技术评价正常左室壁等容舒张[J]. 中国临床医学影像杂志. 2006, 17(10): 563-565

SONG Yan;QIAN Yun-qiu;ZHANG Hai-bin;LI Hong-ling;LIU Li-wen;ZHENG Min-juan;CUI Kai. Characteristics of left ventricular strain rate imaging during isovolumic relaxation period in normal subjects[J]. Journal of China Clinic Medical Imaging. 2006, 17(10): 563-565

中图分类号： R322.11 R540.45