CAJ | 학술논문

目的：了解多巴酚丁胺对心肌背向散射积分的影响。方法：对19条犬开胸后，采用HP SONOS 5500型彩超仪，用S8探头检测多巴酚丁胺负荷前后心肌的室壁增厚率（WT）、背向散射积分平均值（AIBS）、背向散射积分周期变化幅度（CVIB）的变化。结果：多巴酚丁胺负荷后，心肌收缩加强，全层及心内、外膜下心肌的CVIB也随之增加，其中心外膜下心肌CVIB的增加幅度大于心内膜下心肌，致跨壁梯度指数(TGI)降低，AIBS在整个过程中无明显变化。结论：多巴酚丁胺能增加心肌的CVIB，对AIBS无明显影响。
목적：료해다파분정알대심기배향산사적분적영향。방법：대19조견개흉후，채용HP SONOS 5500형채초의，용S8탐두검측다파분정알부하전후심기적실벽증후솔（WT）、배향산사적분평균치（AIBS）、배향산사적분주기변화폭도（CVIB）적변화。결과：다파분정알부하후，심기수축가강，전층급심내、외막하심기적CVIB야수지증가，기중심외막하심기CVIB적증가폭도대우심내막하심기，치과벽제도지수(TGI)강저，AIBS재정개과정중무명현변화。결론：다파분정알능증가심기적CVIB，대AIBS무명현영향。
Objective: To understand the effect of dobutamine on the integrated backscatter of myocardium. Methods: Nineteen open-chest dogs were detected by HP Sonos 5500 with S8 transducer, and the WT, AIBS and CVIB were measured before and after the dobutamine stress. Results: During the dobutamine stress, following the increase of WT, the transmural, subepicardial and subendocardial CVIB all increased. And the increase of subepicardial CVIB was greater than that of subendocardial CVIB, leading to the decrease of TGI. But the AIBS didn't change significantly in the whole process. Conclusion: Dobutamine can enhance myocardium CVIB but has no obvious infleunce on AIBS.