扩张型心肌病左室扩张类型与室性心律失常的关系

以24小时动态心电图和二维超声心动图对41例扩张型心肌病患者进行观察,多元回归分析显示:左室舒张末内径与后壁厚度之比(D/T)和室性心律失常程度显著相关。按D/T将患者分为过度扩张型、混合型和肥厚扩张型3组,过度扩张型室性心动过速发生率(91.76%)显著高于混合型(37.5%)和肥厚扩张型(16.7%)。过度扩张型住院病死率50%,显著高于混合型(18.75%);肥厚扩张型无住院死亡。因此,D/T对判断扩张型心肌病易发室性心律失常者具有重要意义。

Relationship Between Left Ventricular Dilation Type and Ventricular Arrhythmias in Dilated Cardiomyopathy

41 Patients with dilated cardiomyopathy were studed by mens of 24-hour ambulatory ECG and two-dimensional ecohcardiography. Multivariate regression analyses indicated: the ratio of left ven tricular diastolic internal dimention (D) to left ventrieular end diastolic thickness (T) was eorelative with the degree of ventricular arrhythmias. According to the ratio of D/T, the patients may be separated into 3 groups: over-dilated type, mixed type, and hypertrophy-dilated type. The incidence of ventricular tachycardia in over-dilated type was 91. 67%, it was higher significantly than both mixed type (37.5%) and hypertrophy-dilated type (16.7%). Mortality rate of over-dilated type was 50%, higher significantly than mixed-type (18.75%), and there was not hospitalization death in hypertrophy-dilated type. Thus, the increase of D/T is an useful information to prediete vulnerability of ventrieular arrhythmias in dilated eardiomyopathy.