经胸放射治疗后的不稳定型心绞痛患者冠状动脉影像学及临床特点分析

目的 观察经胸放射治疗后冠心病患者的冠状动脉影像学及临床特点.方法 选择不稳定型心绞痛(UAP)患者58例,其中经胸放射治疗后的UAP患者28例(经胸放疗后组);普通UAP患者30例(普通心绞痛组).全部患者行冠状动脉多排螺旋CT(MSCT)检查、冠状动脉造影术(CAG)及经皮冠状动脉介入治疗(PCI),随访1年,测定两组患者脑钠尿肽(BNP)水平,观察心血管事件的发生率,并进行比较.结果 经胸放疗后组冠状动脉病变特点与普通心绞痛组比较,钙化病变、多支病变、血栓病变以及PCI术中夹层发生率明显升高,1年随访时BNP水平较普通心绞痛组高(234.31±121.39)ng/L比(124.74±37.81)ng/L],室壁运动指数、新发心功能不全及再发心绞痛、再次血运重建的比例也较普通心绞痛组高,差异均有统计学意义(P<0.05).结论 经胸放射治疗后患者冠状动脉病变以复杂病变为主,同时因放射性心肌及瓣膜损伤,使得该类患者远期预后更差.

Feature of clinic and imageology in patients with unstable angina pectoris after radiation therapy to chest

Objective To observe feature of clinic and imageology in patients with unstable angina pectoris after radiation therapy to chest. Methods The study enrolled 58 patients who had unstable angina pectoris. Twenty-eight patients were in the postradiation therapy to chest group, 30 patients were in the common unstable angina pectoris group. All patients underwent multislice spiral CT(MSCT) examination and coronary angiography (CAG). After one year follow-up, the levels of brain natriuretic peptide (BNP) and ventricular wall motion score index (WMSI) were measured , the incidence of cardiovascular events were observed in all patients. Results Calcific, multi-vessel, thrombotic disease and dissection were significantly different between the two groups, when one year follow-up , the levels of BNP were higher in the postradiation therapy to chest group than those in the common unstable angina pectoris group (234.31 ± 121.39) ng/L vs (124.74 ±37.81) ng/L] WMST, incidence of the first heart failure, angina pectoris recurrence and revascularization were significantly different too (P< 0.05 ). Conclusions The complex lesions are major in the postradiation therapy to chest. Moreover, because radiation injures the heart valves and myocardium,these patients' long-term prognosis are worst.