慢性稳定型冠心病ST—T改变与左室射血分数关系的研究

The study on the relationship between the change of ST-T of chronic stable CAD and LVEF

目的探讨慢性稳定型冠心病（CAD）患者静息常规心电图ST—T改变与左室射血分数（LVEF）的关系，了解ST—T改变预测左室功能的意义。方法对80例慢性稳定型冠心病患者资料进行回顾性分析，对其中40例伴有胸前导联ST-T改变者（阳性组）及40例不伴有胸前导联ST—T改变者（阴性组）进行左室LVEF及冠状动脉造影结果分析。结果心电图阳性组中，LVEF降低率为72．5％，高于心电图阴性组的22．5％（t=6．125，P=0．000），并且心电图阳性组中，冠脉病变2支及3支病变患者有27例，心电图阴性组为17例，两组冠脉病变程度与心电图ST—T改变的关系比较差异有统计学意义（x^2=9．683，P=0．008）。结论静息常规心电图ST-T改变对预测慢性稳定型冠心病的左心室功能具有一定的意义，这种关系可能与冠脉病变程度有关。

Objective To study the relationship between the change of resting electrocardiogram ST-T in chronic stable coronary atherosclerotic heart disease（CAD） and left ventricle enjection fraction（LVEF）. To know the significance that the change of ST-T may predict the function of left ventricle. Methods 80 patients with CAD in our cardaic department were analyzed retrospectively,40 patients with the change of ST-T（ positive group） and 40 patients without the change of ST-T（negative group） were analyzed the outcome of LVEF and the extent of coronary lesion. Results The LVEF of positive group was lower than negative group obviously, the comparision between both groups had statistical significance （t =6.125, P = 0. 000）. In the electrocardiogram positive group, the number of the patients who had 2 and more than 2 branches lesion was more than negative group, the comparision between both groups had statistical ＂ ＇ 2 significance（~ = 9. 683, P = 0. 008）. Conclusion The change of ST-T may predict the function of left ventricle of patients with chronic stable coronary atherosclerotic heart disease,the relationship may be connected with the degree of coronary lesion.