不稳定性心绞痛患者QT离散度的临床意义  

Clinical evaluation of QT dispersion in patients with unstable angina pectoris

作　　者：李媛[1] 刘婧[1] 曹袁宁[1] 

机构地区：[1]宁夏银川市第一人民医院心内科,宁夏银川750001

出　　处：《宁夏医学杂志》1999年第12期721-722,共2页Ningxia Medical Journal

摘　　要：目的　观察ＱＴｄ 与冠心病心绞痛患者心肌供血不足及病情程度的关系。方法　将６０ 例心绞痛患者，分为稳定性及不稳定性心绞痛两组，每组各３０ 例，另有３０ 例正常人作为对照组；在安静状态下记录标准１２ 导联心电图，测量其各导联ＱＴ 间期，然后用ＱＴｍａｘ － ＱＴｍｉｎ 得ＱＴｄ，并用心率校正得ＱＴｃｄ。结果　两组心绞痛患者ＱＴｄ 明显大于正常对照组（ Ｐ ＜０．０１） ，不稳定心绞痛组ＱＴｄ 及ＱＴｃｄ 明显大于稳定性心绞痛组（ Ｐ＜ ０．０５） 。结论　ＱＴｄ 增大与冠心病心绞痛患者的心肌缺血及其病情严重程度呈正相关，ＱＴｄ 对心绞痛病情估计有一定价值。Objectives To observe the erlation of QT dispersion (QTd)with the degree of myocardial Ischemia.Methods All 60 patients with angina pectoris were classified into stable and unstable angina groups 30 patients in each.Stamdard 12 leads ECG were recorded and QT intervals were measured.QTd was calculated by QTmax-QTmin and QTcd was got by heart rate correction.All data were compared with 30normal patients in control group.Results QTd in two angina groups was significantly higher than in control group(P<0.01).QTd and QTcd in unstable angina group were higher than in stable angina group.Conclusions Bigger QTd corelates well with the degree of myocardial ischemia in patients with angina pectoris.It is valuable in evaluating severity of nagina.

关 键 词：心绞痛 不稳定型 QT离散度 心肌缺血 

分 类 号：R541.4[医药卫生—心血管疾病] R542.2[医药卫生—内科学]