摘要
目的评价心脏再同步化治疗(CRT)不同起搏方式的优劣点。方法12只心衰犬,采用自身对照方法随机行右心房-心室不同位点起搏,心室位点分别取右室双部位(RV-Bi)、双室(Bi-V)、左室(LV),起搏频率180次/min,每种方式起搏前及起搏稳定15min后行彩色多普勒超声心动图检查,测定左心室舒张末期直径(LVEDd)、左室射血分数(LVEF)、室间机械延迟(IVMD)、室间隔与左室后壁运动延迟(SPWMD)、左心室12个节段达峰时间的标准差(Ts-SD)。结果(1)与起搏前相比:右室双部位、双室、单纯左室起搏时,LVEDd、IVMD、SPWMD、Ts-SD减小,LVEF增加,差异有统计学意义[(42.42±3.94)mmVS(34.00±4.07)mm、(34.17±3.95)mm、(33.75±4.18)mm;(28.08±4.01)mmVS(13.00±3.64)mm、(11.95±2.54)mln、(12.08±3.51)mm;(75.00±10.22)mmVS(51.75±9.84)mm、(20.66±7.41)mm、(20.75±7.56)mm;(25.08±4.16)mmVS(14.91±3.31)mm、(7.50土4.24)mm、(7.41士3.39)mm;(32.91士4.46)mmVS(41.50±4.16)mm、(42.00±4.63)mm、(42.41±4.99)mm,P〈0.05]。(2)与右室双部位起搏相比:双室、单纯左室起搏时,SP-WMD、Ts-SD减小,差异有统计学意义(P〈0.05);LVEDd、IVMD、LVEF在三者间差异无统计学意义(P〉0.05);(3)LVEDd、IVMD、SPWMD、Ts—SD、LVEF在单纯左室及双室起搏间差异无统计学意义(P〉0.05)。结论右室双部位、单纯左室与双室起搏有近似的血流动力学效果,可作为CRT双室起搏的备选模式,但三者改善心室不同步的机制不完全相同。
Objective To evaluate advantages and disadvantages of different pacing modes of cardiac resynchronization therapy (CRT). Methods Twelve dogs with heart failure were performed in every dog at random , and the pacing modes employed in the test included right atrium- different sites of ventricle, and ventricular sites included right ventricular bifocal( RV-Bi), biventricular( Bi-V), left ventricular (LV). The pacing frequency was 180 times per minute, and the results were measured before pacing and after 15 minutes when the pacing became stable in Color Doppler echocardiography, including left ventricular enddiastolic diameter (LVEDd), left ventricular ejection fraction (LVEF), interventricular mechanical delay (IVMD), interventricular septum and left ventricular posterior wall motion delay (SPWMD), left ventricular 12-segment peak time standard deviation (Ts-SD). Results (1)Compared with before pacing, at the RV-Bi, Bi-V, and LV pacing modes, LVEDd, IVMD, SPWMD, and Ts-SD decreased, LVEF increased, the difference was statistically significant [ ( 42. 42 ± 3.94 ) mm vs ( 34. 00 ± 4. 07 ) mm, ( 34. 17 ± 3.95 ) mm,(33.75 ±4. 18)mm;(28.08 ±4.01)mm vs (13.00 ±3.64) ram, (11.95 ±2.54) mm, (12.08 ± 3.51 ) mm; (75.00 ± 10. 22) mm vs (51.75 ±9. 84) mm, (20. 66 ±7.41)mm, (20..75 ±7.56) mm; (25.08 ±4. 16)mm vs (14.91 ± 3.31) mm, (7.50 ±4.24) mm, (7.41 ± 3.39) mm; (32.91 ±4.46) mm vs (41.50 ±4. 16)mm, (42.00 ±4. 63)mm, (42. 41 ±4. 99)mm, P 〈0.05]. (2)Compared with RV-Bi pacing mode, at the Bi-V, LV pacing modes, SPWMD and Ts-SD decreased, the difference was statistically significant ( P 〈 O. 05 ) ; there was no significant difference among LVEDd, IVMD, and LVEF ( P 〉 0. 05). (3)There was no significant difference in LVEDd, IVMD , SPWMD, Ts-SD and LVEF between LV and Bi-V pacing ( P 〉 0.05 ). Conclusions The hemodynamic effects of RV-Bi and LV pacing modes were similar to that of Bi-V pacing, and they can be used as CRT biventricular pacing alternative modes; however, the mechanisms of improving ventricular synchronization are not identical in above pacing modes.
出处
《中国医师杂志》
CAS
2013年第1期15-17,共3页
Journal of Chinese Physician
基金
全军医药卫生科研基金资助项目(CWS10JA24)
关键词
狗
疾病模型
动物
心力衰竭
治疗
心脏起搏
人工
方法
Dogs
Disease models, animal
Heart failure/therapy
Cardiac pacing, artificial/methods