Study of left ventricular function in patients with DDD pacemaker implantation during atrioventricular conduction and right ventricular apex pacing mode
10.3760/cma.j.issn.1004-4477.2016.02.001
- VernacularTitle:DDD起搏器植入患者房室顺序下传及右室心尖部起搏模式下左心室功能评估
- Author:
Jing YAO
;
Di XU
;
Yanjuan ZHANG
;
Huan TANG
;
Bing XIE
;
Yang DAI
;
Rong ZHANG
;
Hui WANG
;
Yonghong YONG
;
Hongping WU
;
Lei ZHOU
;
Ling JI
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Sick sinus syndrome;
Cardiac pacing,artificial;
Ventricular function,left;
Twist
- From:Chinese Journal of Ultrasonography
2016;25(2):93-98
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the left ventricular function parameters of patients with sick sinus syndrome ( SSS ) and DDD pacemaker implantation during atrioventricular conduction ( AVC ) and right ventricular apex pacing ( RVAP ) mode . Methods Forty‐six consecutive patients with SSS who had undergone DDD pacemaker implantation were studied . Fifty volunteers were included as control group . Changing from AVC to RVAP mode ,the acute effect on echocardiographic parameters ,including LVEF , parameters of aortic/pulmonary artery pulse wave Doppler ,and parameters of left ventricular twist by speckle tracking imaging were measured respectively . Pacemaker implantation duration and cumulative ventricular pacing proportion ( Cum% VP) were recorded . The relationships of pacemaker parameter and above left ventricular function parameters were analyzed . Results Compared with control group ,values of peak rotation in LV apex and LV twist were significantly lower during AVC and RVAP mode . The value of peak rotation in LV base showed no significant difference between three groups .Apical‐basal rotation delay during RVAP was significantly longer than those during AVC and in control group respectively ( P <0 .05) . LVEF during RVAP decreased statistically ( P< 0 .05 ) ,but showed no difference during AVC , compared with the control group . The peak LV twist related positively with LVEF ,and negatively with Cum% VP . Conclusions RVA pacing decreases left ventricular function , which is independent of asynchrony contraction patterns caused by pacing . LVEF ,apical rotation and LV twist are more sensitive to demonstrate the LV dysfunction in patients with pacemaker implantation . LV twist related negatively with Cum% VP .
