本文關(guān)鍵詞： 速度向量成像技術(shù) 心肌力學(xué) 超聲心動(dòng)圖　出處：《中國(guó)現(xiàn)代醫(yī)學(xué)雜志》2013年35期 　論文類(lèi)型：期刊論文

【摘要】：目的探討速度向量成像技術(shù)(VVI)分析新西蘭大白兔心肌力學(xué)的可行性和正常情況下新西蘭大白兔心臟結(jié)構(gòu)力學(xué)特點(diǎn),為研究人類(lèi)心肌結(jié)構(gòu)力學(xué)打下基礎(chǔ)。方法新西蘭大白兔30只,實(shí)驗(yàn)動(dòng)物于基礎(chǔ)狀態(tài)下行VVI模式的超聲心動(dòng)圖檢查,采集胸骨旁左心長(zhǎng)軸切面和左心二尖瓣水平、乳頭肌水平、心尖水平短軸切面的二維動(dòng)態(tài)圖像行VVI分析。結(jié)果基礎(chǔ)狀態(tài)下兔左心室長(zhǎng)軸方向上心肌運(yùn)動(dòng)速度峰值心底節(jié)段最高,向心尖方向遞減,差異有統(tǒng)計(jì)學(xué)意義(P0.05),應(yīng)變和應(yīng)變率峰值無(wú)明顯改變(P0.05);短軸方向上同一水平各節(jié)段心肌運(yùn)動(dòng)速度峰值前間隔和前壁最大,應(yīng)變和應(yīng)變率峰值前壁及側(cè)壁大于其他各節(jié)段,差異有統(tǒng)計(jì)學(xué)意義(P0.05);左心室收縮期心底部向順時(shí)針?lè)较蛐D(zhuǎn),心尖部向逆時(shí)針?lè)较蛐D(zhuǎn),舒張期均向反方向解旋,心尖部位的旋轉(zhuǎn)角度、速度和解旋速度均大于心底部(P0.05),左心室收縮期扭轉(zhuǎn)角度為(10.76±2.24)°。結(jié)論VVI可用于評(píng)價(jià)新西蘭大白兔基礎(chǔ)狀態(tài)下左心室的心肌力學(xué)特征,正常情況下其心臟長(zhǎng)軸、短軸及扭轉(zhuǎn)運(yùn)動(dòng)存在一定規(guī)律。
[Abstract]:Objective to investigate the feasibility of velocity vector imaging (VVI) analysis of myocardial mechanics in New Zealand white rabbits and the characteristics of cardiac structural mechanics in New Zealand white rabbits under normal conditions, so as to lay a foundation for the study of human myocardial structural mechanics. The experimental animals were examined by echocardiography of VVI mode in the basic state. The long axis of the parasternal left heart, the level of mitral valve and the level of papillary muscle were collected. VVI analysis was performed on two-dimensional dynamic images of the apical horizontal short axis section. Results the peak myocardial velocity in the long axis direction of the left ventricle was the highest in the basal state, and decreased in the apical direction. The difference was statistically significant (P 0.05), the peak value of strain and strain rate had no significant change (P 0.05), and the peak of myocardial velocity in the same level was the largest in the anterior septum and anterior wall, and the peak of strain and strain rate in anterior wall and lateral wall was larger than that in other segments. The left ventricular systolic heart bottom rotates clockwise, the apical part rotates counterclockwise, the diastolic phase unrotates in the opposite direction, and the rotation angle of the apical part. The velocity and rotation velocities were higher than that in the bottom of the heart, and the torsion angle of the left ventricle was 10.76 鹵2.24 擄. Conclusion VVI can be used to evaluate the mechanical characteristics of the left ventricle in the basal state of New Zealand white rabbits, and the long axis of the heart in normal condition. The short axis and torsional motion have certain regularity.
【作者單位】： 南華大學(xué)附屬第一醫(yī)院超聲科;中南大學(xué)湘雅二醫(yī)院超聲科;
【基金】：國(guó)家自然科學(xué)基金(No:30970838)
【分類(lèi)號(hào)】：R331

【共引文獻(xiàn)】

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本文編號(hào)：1555196