扩张型心肌病患者双嘧达莫负荷心肌^201Tl SPECT显像分析

Dipyridamole ^201Tl myocardial SPECT imaging in patients with dilated cardiomyopathy

目的 观察扩张型心肌病患者的双嘧达莫负荷心肌201Tl SPECT显像表现.方法 2008年8月至2009年12月临床符合扩张型心肌病诊断标准的住院患者30例,按体质量0.56 mg/kg给予其双嘧达莫,于4 min内静脉注射,2 min后注射201Tl,注射完后10及240 min分别进行双嘧达莫负荷心肌201Tl SPECT显像,图像经三维重建后由2位以上有经验的核医学科医师进行分析.结果 27例（90.00%）患者的双嘧达莫负荷201Tl图像（10 min）显示左心室心肌放射性分布异常.延迟（240 min）显像时所有患者均出现左室心肌放射性分布异常,其中6例患者出现＂反向再分布＂.结论 双嘧达莫负荷心肌201Tl SPECT显像对指导扩张型心肌病的诊治具有一定的临床意义.

Objective To explore the characteristics of dipyridamole 201 Tl myocardial perfusion imaging （MPI） SPECT in patients with dilated cardiomyopathy. Methods Thirty patients with dilated cardiomyopathy underwent pharmacological stress 201Tl MPI SPECT after intravenous infusion of dipyridamole （0. 56 mg/kg） for 4 min. The early and delayed SPECT images were acquired respectively at 10 and 240 min after 201Tl injection. The images were analyzed and reported by two or three experienced nuclear medicine physicians. Results All patients were found to have abnormal perfusion patterns at delay imaging, however 90.00% （27/30） were also abnormal at early images. Six patients had reverse redistribution. Conclusion Dipyridamole 201Tl MPI SPECT imaging may be of some value for the assessment of patients with dilated cardiomyopathy.