放射性核素多门电路心血池显像评价保留瓣下结构的二尖瓣置换术后的左室心功能  

Left Ventricular Function Evaluation after Mitral Valve Replacement with Preservation the Subvalvular Apparatus

作　　者：邓候富[1] 李林[1] 肖锡俊[1] 谭天秩[1] 莫廷树[1] 秦卫仕[1] 柴力 田子朴[1] 石应康[1] 张春[1] 

机构地区：[1]华西医科大学附属第一医院核医学科,成都610041

出　　处：《华西医科大学学报》1999年第3期343-344,共2页Journal of West China University of Medical Sciences

摘　　要：为了解行保留瓣下结构二尖瓣置换术后患者左室功能的变化，采用放射性核素平衡法多门电路心血池显像，测定了１４ 例行保留瓣下结构的二尖瓣置换患者的术前和术后６ 月左室心功能。结果显示，术后左室射血分数５１．６８±１８．２， 较术前 ４０．０±１７．８ 有明显升高（ Ｐ＜ ０．０５），术后侧壁的局部射血分数为 ６９．７±２１．２， 较术前 ５１．０±１８．１ 也有显著升高（ Ｐ＜ ０．０１），表明保留瓣下结构的二尖瓣置换术后患者的左室功能有明显改善。The objective of this study was to evaluate the left ventricular function after mitral valve replacement (MVR) with preservation of all chordae. Fourteen patients with a diagnosis of mitral regurgitation were studied. These patients, 4 males and 10 females, age from 24 to 59 years, who underwent mitral valve replacement, in which all chordae tendineae were preserved. The mean follow up interval was 6 months. Preoparation and postoperation multigated equilibrium radionuclide angiography was performed by Elscint Helix Apex SPECT. Each patient was injected with 740MBq 99m Tc HSA, rest ejection fraction (global EF) of LV (%), regional ejection fraction (EF) of LV (%), PER/S and PFR/S were measured. Regional EF was calculated by the method of dividing the left ventricle into five segments by radial axis. The results showed that the postoperative EF of the whole left ventricle of the chordae preserved patients was significantly greater than their preoperative EF (40.0%±17.8%,to 51.6%±18.2%, P <0.02), and also the regional EF at the lateral wall of the chordae preserved MVR was significantly greater than the preoperative regional EF (an increase from 51.0%±18.1% to 69.7%±21.2%, P <0.01). MVR with preservation of all chordae, the patient's left ventrioular function remarkably improved.

关 键 词：放射性核素 多门电路 心血池显像 二尖瓣置换 

分 类 号：R817.42[医药卫生—影像医学与核医学]