老年高血压左室肥大QT离散度改变及与心率变异关系  

The relationship of QT dispersion and heart rate variability to elderly hypertensive subjects with left ventricular hypertrophy

作　　者：林伟[1] 朱英琪[1] 蔡巍[1] 

机构地区：[1]浙江省望江山疗养院,杭州市310024

出　　处：《实用老年医学》2000年第2期73-75,共3页Practical Geriatrics

摘　　要：目的　探讨老年高血压左室肥大QT离散度的改变 ,及与心率变异的关系。　 方法　对 85例老年高血压患者进行动态血压、心脏超声、QT离散度及心率变异的分析 ,并对左室肥大指数与QT离散度、血压与心率变异作相关分析。　 结果　高血压伴左室肥大者QT离散度增加 [QTcd :(5 0 98± 18 79)ms ,QTacd :(5 1 2 1± 13 42 )ms ,QTsD :(15 47± 7 0 8)ms ,QTaSD :(15 48± 4 6 5 )ms] ;左室肌重与非左室肥大相比 ,心率变异无明显差别 (P >0 0 5 ) ;左室肥大指数 (LVMI)与QT离散度 (QTcd、QTacd、QTsD、QTaSD)呈正相关 ,血压 (SBP、DBP)与心率变异 (MSSD、HF、LF、TF)呈负相关。　 结论 　高血压左室肥大者心肌局部复极化不一致 ,高血压患者心率变异下降 。Objective To investigate the relationship of QT dispersion and heart rate variability(HRV)to elderly hypertensive subjects with left ventricular hypertrophy(LVH). Methods A total of 85 hypertensive subjects received the examinations of ambulatory blood pressure minitoring,echocardiography,QT dispersion and HRV.The correlation analysis bewteen LVMI and QT dispersion parameters,blood pressures and HRV parameters are analysed. Results The QTcd,QTacd were significantly higher in LVH group then in non LVH group(50 98±18 79,51 21±13 42 vs 32 03±11 57,24 12±9 03 respectively, P <0 01 and QTsd,QTaSD as well).The LVMI were positively correlated with QT dispersion.There was no difference in HRV between LVH and non LVH group and the BP(SBP,DBP)were negatively correlated with HRV. Conclusions The repolarization of local myocardium in hypertensive subjects with LVH are not simutaeiously.The HRV of hypertensive subjects decreased,but there are no relationship between HRV and the alteration of left ventricular structure.

关 键 词：高血压 左室肥大 QT离散度 心率变异 

分 类 号：R544.1[医药卫生—心血管疾病]