Ⅰ型和Ⅲ型无痛性心肌缺血的血液流变特性

A Preliminary Study of Hemorheological Parameters of Patients with Silent Myocardial Ischemia

52例SMI和22例正常人对照研究发现:31例Ⅲ型SMI的高、中和低切变率下的表观粘度、血浆粘度和红细胞内粘度以及心肌总缺血负荷时间均高于或长于21例Ⅰ型SMI(P<0.05～0.01)。提示无心绞痛发作的Ⅰ型SMI的血液流变特性异常程度轻和心肌总缺血负荷时间较短。

Fifty-two patients with silient myocardial ishcemia (SMI) were categorized into Type Ⅰ SMI group (n=21) and Type HI SMI group (n=31).22 normal subjects were also observed to serve as the control.It was found that the apparent viscosity of whole blood at different shear rate of 192.0 s-1,30.72s-1,and 3.84 s-1,the plasma viscosity,and the inter-viscosity of erythrocytes,and the duration of total myocardial ischemia on Holter monitoring electrocardiogram were higher and longer in Type Ⅲ SMI patients than in Type Ⅰ SMI ones and the normal controls (P<0.05~0.01).The findings imply that no attack of angina pectoris in the type I SMI cases results from mild alterations of the hemorheological parameters and short duration of total myocardial ischemia.